A military convoy, which includes tanks, were dispatched Syrian border in Turkey's southern Hatay province, a security source said on Saturday.
Anadolu Agency video footage shows a group of five tanks loaded on trucks and driven on an unpaved road.
A military source, who spoke on condition of anonymity due to restrictions on talking to media, said that the tanks were sent as reinforcements to the Turkish border units.
Early on Sunday, an Anadolu Agency correspondent in the region said that the Turkish military hit several PKK/PYD targets in the Afrin district of Syria's Aleppo province to prevent a "terror corridor" from forming along Turkey's borders.
The Turkish army fired at least 40 times during the artillery bombardment in Afrin’s five regions including Bosoufane, Jindires, Rajo.
The Turkish artillery units hit PKK/PYD forces from Turkey's southern province of Hatay.
The military operation follows President Recep Tayyip Erdogan's call on PKK/PYD terrorists in the Afrin district of Syria's Aleppo province to surrender.
Erdogan said Saturday that any venture in the region "has no chance of success" if Turkey has no consent in it, referring to the PYD/PKK terror group's effort to settle in Syria's northern regions along the Turkish border.
Turkey will interfere "if the terrorists in Afrin do not surrender," Erdogan also said, adding that Turkish forces "are destroying the western wing of this corridor with the Idlib operation".
On Saturday, Turkish artillery units based in Turkey's southern Hatay province and Syria's Idlib hit PKK/PYD terrorist positions in Afrin's Bosoufane, Cindirese, Deir Bellout and Rajo districts, according to Anadolu Agency correspondents in the field.
The PKK/PYD is the Syrian offshoot of the PKK, which is listed as a terrorist organization by Turkey, the U.S. and EU.
Since the PKK launched its terror campaign in 1984, an estimated 40,000 people have been killed in Turkey in related violence.
Following a fragile cease-fire, the group resumed fighting in July 2015. Since then, it has been responsible for the deaths of approximately 1,200 security personnel and civilians, according to an official tally.
By Erdal Turkoglu and Ilker Girit