SANLIURFA, TURKEY - DECEMBER 11: Funeral ceremony is held for police officer Suleyman Sorkut, who was martyred during Istanbul terror attacks, in Siverek district of Sanliurfa, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Mehmet Fatih Aslan - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: A man reads Quran as people leave carnations and light candles for the victims at site of Istanbul terror attack in Besiktas district of Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: People leave carnations and light candles for the victims at site of Istanbul terror attack in Besiktas district of Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: A boy lights a candle for the victims at site of Istanbul terror attack in Besiktas district of Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: A police vehicle with flowers is seen as people gather for the victims of Istanbul terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Onur Çoban - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: People gather to leave carnations for the victims of Istanbul terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Onur Çoban - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: People gather to leave carnations for the victims of Istanbul terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Onur Çoban - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: People gather to leave carnations for the victims of Istanbul terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Onur Çoban - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: Women cry as people leave carnations for the victims of Istanbul terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Onur Çoban - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: A woman cries as people leave carnations for the victims of Istanbul terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Onur Çoban - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11: A man cries as people leave carnations for the victims of Istanbul terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Onur Çoban - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan (3rd L) and Turkish Health Minister Recep Akdag (2n L) visit the injured police officers at Bezmialem Hospital in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan (2nd R) and Turkish Health Minister Recep Akdag (R) visit the injured police officers at Bezmialem Hospital in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan visits the injured police officers at Bezmialem Hospital in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan visits the injured police officers at Bezmialem Hospital in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan talks with the relatives of the martyrs of Istanbul terror attack during a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan talks with the relatives of the martyrs of Istanbul terror attack during a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan talks with the relatives of the martyrs of Istanbul terror attack during a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan talks with the relatives of the martyrs of Istanbul terror attack during a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan talks with the relatives of the martyrs of Istanbul terror attack during a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish President Recep Tayyip Erdogan talks with the relatives of the martyrs of Istanbul terror attack during a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Relatives of martyrs of Istanbul terror attacks attend a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Relatives of martyrs of Istanbul terror attacks attend a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Relatives of martyrs of Istanbul terror attacks attend a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Relatives of martyrs of Istanbul terror attacks attend a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Relatives of martyrs of Istanbul terror attacks attend a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Relatives of martyrs of Istanbul terror attacks attend a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Funeral ceremony held for the martyrs of Istanbul terror attacks at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Relatives of martyrs of Istanbul terror attacks attend a funeral ceremony at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Funeral ceremony held for the martyrs of Istanbul terror attacks at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Arif Hüdaverdi Yaman - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : Turkish Interior Minister Suleyman Soylu, Turkish Prime Minister Binali Yildirim, Turkish President Recep Tayyip Erdogan,Turkey's former President Abdullah Gul and Turkish Foreign Minister Mevlut Cavusoglu attend the funeral ceremony for the martyrs of Istanbul terror attacks at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

ISTANBUL, TURKEY - DECEMBER 11 : (L-R) Turkish Interior Minister Suleyman Soylu, Turkish Prime Minister Binali Yildirim, Turkish President Recep Tayyip Erdogan,Turkey's former President Abdullah Gul and Turkish Foreign Minister Mevlut Cavusoglu attend the funeral ceremony for the martyrs of Istanbul terror attacks at Istanbul Police Department headquarters in Istanbul, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on December 10, 2016. ( Kayhan Özer - Anadolu Agency )

IZMIR, TURKEY - DECEMBER 11: Turkish national flags fly at half mast during a day of national mourning after the terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Cem Öksüz - Anadolu Agency )

IZMIR, TURKEY - DECEMBER 11: Turkish national flags fly at half mast during a day of national mourning after the terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Cem Öksüz - Anadolu Agency )

IZMIR, TURKEY - DECEMBER 11: Turkish national flags fly at half mast during a day of national mourning after the terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Cem Öksüz - Anadolu Agency )

IZMIR, TURKEY - DECEMBER 11: Turkish national flags fly at half mast during a day of national mourning after the terror attacks near the Vodafone Arena in Istanbul's Besiktas, Turkey on December 11, 2016. At least 38 people, including 7 civilians, were killed and 155 people were injured in two separate bomb attacks in the Besiktas district of Istanbul on Saturday. ( Cem Öksüz - Anadolu Agency )