Turkish President Tayyip Erdogan and U.S. President Donald Trump agreed in a phone call overnight to act jointly against IS in the Syrian towns of al-Bab and Raqqa, both controlled by the militants, Turkish presidency sources said on Wednesday. The two leaders discussed issues including a safe zone in Syria, the refugee crisis and the fight against terror, the sources said. They also said Erdogan had urged the United States not to support the Syrian Kurdish YPG militia.