US President Donald Trump and Turkish President Recep Tayyip Erdogan discussed the Syrian conflict and trade issues in a phone call on Thursday, agreeing to continue coordinating their efforts to create a potential safe zone in Syria, the White House said.

The call between the two presidents came ahead of a meeting this week between Acting US Defense Secretary Patrick Shanahan and Marine General Joseph Dunford, chairman of the Joint Chiefs of Staff, with their Turkish counterparts, the White House said.