Turkish President Recep Tayyip Erdogan told Reuters in an interview on Monday, September 19 that the United States should "not harbor a terrorist" like U.S.-based cleric Fethullah Gulen and that his activities should be banned around the world, the news agency reports.

Gulen, who has lived in self-imposed exile in Pennsylvania since 1999, denies involvement in Turkey's failed coup in July and Washington has said it will extradite him only if Turkey provides evidence, much to the Turkish government's frustration.

Erdogan said Washington had "no excuse" for keeping Gulen, a former Erdogan ally who Turkish officials say has built up a network of followers over decades inside the armed forces and civil service to take over Turkey.

"If the U.S. is our strategic ally and our NATO partner ... then they should not let a terrorist like Gulen run his organization," Erdogan said, in an interview on the sidelines of the annual gathering of world leaders at the United Nations.

Erdogan said an initial three months state of emergency, declared in the wake of the coup, could be extended if necessary.

Critics say extending the state of emergency will give Erdogan a freer hand to limit or suspend freedoms, to bypass the parliament as well as taking swift measures against his opponents.

Also Monday, Erdogan said the EU had failed to meet its obligations despite Turkey's decades-long efforts to join the trading bloc.

"Turkey has kept its promises regarding the EU membership process ... it is a two-way street and the EU should fulfill its promises ... We have not concluded this process ... we want the EU to be honest about this process," he said, according to Reuters.