The launch came despite warnings that the operation could be militarily tough against an already battle-hardened foe and complicate relations with both Washington and Moscow.
Ahmet Berat Conkar, a ruling party MP and head of Turkish delegation to NATO Parliamentary Assembly, said: "Russia is taking steps to move its forces in Afrin away from the areas where there might be clashes [during Turkey's operation]".
"Seven civilians were killed, including a child, as well as two female fighters and one male fighter", said Birusk Hasakeh, adding that the child was an eight-year-old boy. The state-run Anadolu Agency said buses carried Turkish commandos to Hatay on Friday while Syrian opposition fighters were also taken to the province from a Turkish-controlled zone in Syria.
Turkey says it is planning for military intervention in Syria's Kurdish-controlled Afrin and Manbij regions in response to a "threat" posed by US -backed Kurdish militia fighters.
There were no reports of Turkish ground troops crossing the border but Prime Minister Binali Yildirim said "ground elements" could be deployed today.
Tillerson was reported on Wednesday denying that a border security force will be established, saying the issue has been "misportrayed".
"The U.S. must stop cooperating with this terrorist group", Cavusoglu said.
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But his Turkish counterpart, Mevlut Cavusoglu, said Ankara was not fully satisfied.
The announcement came after the United States said it will work, along with a coalition of its allies purportedly fighting the Daesh terrorist group, with US-backed militants of the the YPG-led Syrian Democratic Forces (SDF) to set up a new 30,000-strong "border security" force.
The US-led coalition has set up a Kurdish-dominated "Border Security Force" in Syria. He said the USA meant to provide training to local elements in areas liberated from the Islamic State.
The U.S. -led worldwide coalition against Daesh said on Sunday that it would establish a 30,000-strong new border security force with the SDF/PKK - a group largely controlled and manned by the PYD/PKK terrorist organization.
"That said, they must be anxious that this could create trouble for them" especially if Turkey fired on YPG-controlled areas to the east with a U.S. presence, he said. "I won't call him as long as he does not get back to me", Anadolu quoted Erdogan as saying. "They will learn how wrong it is to trust a terror organisation".
He warned that the Turkish aircraft will have "no picnic" in Syrian airspace and his forces are ready to "destroy" those incurring jets.
However, Turkish MP Conkar told Al Jazeera that no other country's view can change Turkey's decision to conduct the operation in Afrin. He believes that is why the need for Russia's backing for the Afrin operation is crucial.
An AFP correspondent on the southwestern edge of the Afrin region saw a warplane bombing the western outskirts of the area early on Sunday.