Turkish military sources said that they have retaliated on Sunday against an attack from the YPG. The military sources said that the shelling from the Turkish side will continue as long as the YPG attacks Turkey.Two YPG militants were allegedly killed in the shelling. The military sources also said that three PYD members were captured in Turkey's southern Kilis province.On Saturday, Turkish military shelled YPG targets near the town of Azaz in northern Syria under the rules of engagement, in response to two separate attacks carried out by YPG and Assad forces on a Turkish military base and a police station.