Turkish President Recep Tayyip Erdogan told his Russian counterpart on Sunday that there was a need to “clear” northern Syria of Kurdish forces, during a telephone call. Turkey’s leader said to Vladimir Putin “it is … a priority to clear the border of terrorists, at least 30 km deep”, referring to Kurdish fighters from the People’s Protection Units (YPG) in northern Syria, according to a statement from his office. The two leaders also discussed grain supplies and a potential regional gas hub in Turkey, both countries said. Both men discussed “the problem” of resolving the Syrian conflict and…