Meanwhile, Erdogan has called for US President Barack Obama to extradite US-based Muslim cleric Fethullah Gulen to Turkey. The former ally of Erdogan is accused of being behind the coup attempt.

"After this coup attempt, once again I call on U.S. President Barack Obama. I say: 'Give this person in Pennsylvania to Turkey already.' I call on the United States, if we are strategic partners, if we are model partners, please comply with your partner's request because, we give you every terrorist you wanted from us," he said.