President Obama will meet with Turkish President Recep Tayyip Erdogan on the sidelines of the G-20 summit in China next week to try to resolve a clash unfolding in northern Syria, where one faction of forces backed by the U.S. and Turkey is clashing with another group of Syrian Kurds the CIA has supported, according to the White House.

The meeting takes place nearly one week after Vice President Joe Biden traveled to Turkey and held meetings with Turkish officials, including one with Erdogan, to try to reassure the ally of U.S. support.