A U.S. Justice Department official says a U.S. delegation is set to visit Ankara to speak with Turkish authorities about allegations against Pennsylvania-based cleric Fethullah Gulen. The Turkish government has accused Gulen of masterminding the failed military coup in July that saw more than 200 people killed. While Gulen has denied any involvement, Turkish President Tayyip Erdogan has called for Gulen's extradition back to Turkey and made it clear that a failure to do so would severely damage bilateral relations. "U.S officials, including representatives of the Departments of Justice and State, have offered to consult with the Turkish government," the Justice Department official told Reuters on Saturday, speaking on condition of anonymity. The official confirmed that such a visit was upcoming but did not give specific dates.