Authorities are investigating possible foreign links in the July 15 coup attempt blamed on FETÖ. A senior prosecutor in the capital Ankara where pro-coup troops tried to seize the Presidential Palace and army's headquarters said it seemed unlikely that the terror group would engage in a putsch attempt without foreign support.Harun Kodalak, the chief prosecutor in Ankara, was answering a question from Anadolu Agency about whether his office discovered evidence of involvement of other countries in the coup attempt, a claim which has been popular among the public. "Certainly, we are looking into this matter as well. I can only say that we predict such an outside support and investigate it," he said.It was President Recep Tayyip Erdoğan who first voiced the likelihood of involvement of other countries in the coup attempt. In an interview with al-Jazeera TV following the failed putsch attempt, Erdoğan has said there "may be other countries that played a role in the coup" without elaborating and has pointed out "a superior mind" planning the actions of FETÖ.A survey by pollster MAK following the coup attempt showed 84 percent of participants believed international powers were behind the putsch attempt and the majority of those believing in involvement of other countries said they believed the United States, the current home of FETÖ leader Fetullah Gülen, was behind the coup.Investigations into the coup attempt are still underway with the first hearings of coup plotters scheduled to be held next year. Thousands were detained for the coup attempt after a strong public resistance that resulted in the deaths of 246 people who helped stave off the planned takeover by the terror group. Harun Kodalak told Anadolu Agency that FETÖ suspects collaborating with authorities were helping in the fight against the terror group. "The calls by the president and prime minister to the cult members to invoke a remorse law worked. We have over 300 suspects agreeing to collaborate and we expect more confessions," Kodalak said.The Gülenist Terror Group (FETÖ) founded by former preacher Fetullah Gülen has evolved from a seemingly religious group to a movement broadening its clout in Turkey and the world by amassing a wealth of financial resources and followers. With a large number of infiltrators within judiciary, police and bureaucracy institutions, the group is accused of trying to topple the government twice in 2013 under the guise of anti-graft probes. The group's military might was revealed on July 15 when a small junta loyal to FETÖ sought to overthrow the government and kill the president one month before a meeting of military brass that was expected to expel Gülenist officers from the army. Claiming to be a charitable movement (FETÖ members call it Hizmet or the "service" Movement), the terror group enjoys support abroad where it runs a global network of schools and companies. Though most countries that maintain ties with Turkey agreed to shut down FETÖ-linked schools, some remain open, such as dozens of charter schools in the United States. Germany, a close ally of Ankara, came under fire by Turkish leaders after Berlin announced it would not pursue Gülenists in the country and would not extradite any Gülenist suspects to Turkey.