Turkish forces on Sunday hit PKK/PYD targets in the Afrin district of Syria's Aleppo province to prevent a "terror corridor" from forming along Turkey's borders.
Anadolu Agency in Idlib says, Turkish artillery units hit PKK/PYD forces from the Reyhanli and Kirikhan dictricts of Turkey's southern province Hatay and a Turkish Armed Forces observation point in Idlib.
Turkish Armed Forces fired at least 36 times during the artillery bombardment in Afrin's Bosoufane, Cindirese, Deir Bellout and Rajo districts.
The Afrin operation follows Turkey's successful seven-month Operation Euphrates Shield, which ended last March.
The PKK/PYD is the Syrian offshoot of the PKK, which is listed as a terrorist organisation by Turkey, the US and EU.
Since the PKK launched its terror campaign in 1984, an estimated 40,000 people have been killed in Turkey in related violence.
"We are destroying the western wing of this corridor with the Idlib operation," said President Recep Tayyip Erdogan.
Erdogan added that if terrorists in Afrin did not surrender, Turkey would interfere.