Cooperation between the two terrorist groups, the PKK and the Gülenist Terror Group (FETÖ), was discovered after FETÖ members were found in one of the PKK's cell houses and a secret informant revealed that PKK terrorists had been given foreknowledge related to the July 15 coup attempt.Fourteen FETÖ members were found in the house of two PKK suspects who were detained as part of a terror probe in the western province of Manisa. According to the information in the Turkish media, the PKK terrorists were going to help the FETÖ members escape abroad.Some of the FETÖ members detained in the house were found to be imams for the terrorist group. Fake passports, identity cards and money were also seized in the house.Meanwhile, a secret FETÖ informant in the southeastern Siirt province confessed that two PKK terrorists informed him of a coup attempt in Turkey that was due to take place. The informant claimed the two terrorists approached him on July 14, 2015, a day before the coup attempt, and told him that the president and the prime minister would be killed, and a coup attempt would be staged.There is also other proof of past FETÖ-PKK collaboration. A lieutenant arrested for links to FETÖ, revealed that the group helped him to enroll in a military school despite his links to the PKK.Batman Governor Ahmet Deniz told Anadolu Agency (AA) in August that there were some PKK radio recordings in which they call upon FETÖ terrorists and their own members to "embrace one another."Deniz contended that both terrorist organizations are working toward one common goal. "Both the PKK and FETÖ are coordinated from the same center in their attempts to get in Turkey's way," he said.Moreover, the PKK and FETÖ allegedly collaborated during the Oct. 6-7 events in 2014 that resulted in the deaths of dozens of civilians. According to a report published in Sabah daily, the PKK and FETÖ joined forces in the Oct. 6-7 events that killed 53 people. The remains of Yasin Börü and his friends — who were killed during the second day of the Qurban Bayram holiday as they distributed food aid to Syrian refugees — were found after they were attacked by PKK supporters who claimed the victims supported Daesh.