Last week a faction of Turkey's military attempted to overthrow President Erdogan's government in a night of violence that left over 200 government supporters and 24 conspirators dead.
He will meet with his Cabinet ministers at the conclusion of the security meeting, after which an important announcement is expected. A total of 50,000 civil service employees have been fired in the purges, which have reached Turkey's national intelligence service and the prime minister's office.
The education board, which on Tuesday ordered the resignation of 1,577 university deans, told campus rectors they had until 5 August to "urgently examine the situation of all academic and administrative personnel linked with FETO", a derogatory acronym for the "Fethullah Terrorist Organization".
Academics were banned from traveling overseas on Wednesday in what a Turkish official said was a temporary measure to prevent the risk of alleged coup plotters in universities from fleeing.
Reacting to Ankara's bid to get him extradited, Gulen on Wednesday urged Washington to "reject any effort to abuse the extradition process" and denied any involvement in the putsch. Though fighting in the streets has since ceased, the Turkish government is advising its citizens to remain vigilant of another coup attempt. The Turkish military has been regularly hitting suspected PKK hideouts and position in Iraq since previous year, but Wednesday's strikes were the first since the July 15 botched takeover attempt by a faction within the armed forces, in which several F-16 pilots were involved. The Turkish official assured Carter that Turkey remains a determined and committed partner and ally in the fight against terrorism.
Yildirim said the justice ministry had sent a dossier to US authorities on Gulen, whose religious movement blends conservative Islamic values with a pro-Western outlook and who has a network of supporters within Turkey.
White House spokesman Josh Earnest says Turkey had submitted materials related to Gulen and the administration was reviewing whether they amounted to a formal extradition request.
Turkish President Recep Tayyip Erdogan has accused exiled Turkish businessman and cleric Fethullah Gulen of orchestrating the attempted coup and is demanding that the United States extradite him.
Gulen continues to exert considerable influence in Turkey, with supporters in the media, police and judiciary.
The exiled Gulen has also criticized Erdogan's increasingly authoritarian rule, while the Turkish leader has carried out a broad campaign against Gulen's movement.
Erdogan said Sunday he is receptive to reinstating the country's death penalty in the aftermath of the coup attempt.But EU foreign policy chief Federica Mogherini warned that such a step may end Turkey's EU membership hopes.
"Let me be very clear", she said.
Erdogan's suggestion that the death penalty could be reinstated has sent shudders through Europe, with the European Union warning such a move would be the nail in the coffin of Turkey's already embattled bid to join the bloc.