U.S. President Barack Obama and his Turkish counterpart Recep Tayyip Erdogan will discuss the extradition of preacher Fethullah Gulen at the G20 summit,Turkish presidents spokesman said.

Earlier, U.S. Vice President Joe Biden stated that the U.S. is working with Turkey in the assessment of the evidence against the Islamic preacher Fethullah Gulen.

According to him, U.S, will continue to cooperate with Turkey in order to find new information on Gulen, whom Turkish authorities accuse of the organization of a military coup attempt.