ISTANBUL, TURKEY - NOVEMBER 27: A Turkish flag flies at half-staff in Istanbul, Turkey on November 27, 2017, in tribute to al-Rawdah mosque bombing in the town of Bir al-Abed west of El Arish in North Sina. The death toll in the attack on a mosque in Egypt’s Sinai Peninsula stands at least at 305 people. ( Metin Tokgöz - Anadolu Agency )

ANKARA, TURKEY - NOVEMBER 27: Turkish flags fly at half-staff at Prime Minister's Residence, Cankaya Palace in Ankara, Turkey on 27, 2017, in tribute to al-Rawdah mosque bombing in the town of Bir al-Abed west of El Arish in North Sina. The death toll in the attack on a mosque in Egypt’s Sinai Peninsula stands at least at 305 people. ( Emre Şenoğlu - Anadolu Agency )

ISTANBUL, TURKEY - NOVEMBER 27: A Turkish flag flies at half-staff at the July 15 Martyrs Bridge in tribute to al-Rawdah mosque bombing in the town of Bir al-Abed west of El Arish in North Sina, in Istanbul, Turkey on November 27, 2017. The death toll in the attack on a mosque in Egypt’s Sinai Peninsula stands at least at 305 people. ( Yasin Aras - Anadolu Agency )

ISTANBUL, TURKEY - NOVEMBER 27: A Turkish flag flies at half-staff at the July 15 Martyrs Bridge in tribute to al-Rawdah mosque bombing in the town of Bir al-Abed west of El Arish in North Sina, in Istanbul, Turkey on November 27, 2017. The death toll in the attack on a mosque in Egypt’s Sinai Peninsula stands at least at 305 people. ( Yasin Aras - Anadolu Agency )

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Turkish National flag flies at half-mast at the front yard of the Presidential Complex in Ankara, Turkey on November 27, 2017.

Turkish National flag flies at half-mast at the front yard of the Presidential Complex in Ankara, Turkey on November 27, 2017.

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt

Flags flew at half-mast on buildings across Turkey on Monday to mark a day of mourning for the victims of last week’s terror attack in Egypt