Turkish artillery fired on DAESH positions in Syria on Saturday, a security source said.
Units based in Kilis province fired at targets around Azaz, a town around five kilometres (three miles) from the south of the border, the source said on condition of anonymity due to restrictions on speaking to the media.
The source did not identify any particular threat leading up to the bombardment or say which targets were hit.
Two rockets fired from Syria landed close to an army barracks, police headquarters and court house in Kilis Saturday. A third rocket landed in a farm land in the province, security source added. There were no immediate reports of casualties.
Authorities in the area took measures to tighten security. Bomb-dismantling experts also started a large scale search operation in the area.
On Tuesday, a woman and child were killed when rockets fired from Syria landed in Kilis.
Turkish Prime Minister Ahmet Davutoglu had said DAESH terrorist group was responsible for the attack.
In response to the increasing PKK and DAESH attacks, Turkish security forces have stepped up efforts against the terrorist groups. The country has launched air strikes and shelled the groups' positions in northern Iraq and Syria since late July.
Turkey also considers the PYD - the Syrian branch of the southeast Turkey-based PKK - and its YPG armed wing to be terror groups but the West has refused to designate them as such, instead choosing to see them as allies in the fight against the DAESH terrorist group in Syria.
Since Feb. 12, Turkey has also been intermittently shelling YPG targets in northern Syria near its border, saying that it has been retaliating against artillery fire from YPG forces across the border.
On Saturday, Turkish Foreign Minister Mevlut Cavusoglu said PYD should never be considered as a reliable partner for defeating DAESH.