Egyptian authorities detained a senior Gülenist, Önder Aytaç on Tuesday at the Cairo International Airport. Despite being detained by security forces, Abdelfettah Al-Sissi's coup administration defied the extradition treaty between Turkey and Egypt and refused to extradite Aytaç to Turkey.

Egyptian security forces sent Aytaç back to Nigeria where he has lived for a while. He was en route to the United States when he was detained in Cairo. Aytaç reportedly went to Cairo for a flight to the United States where the head of Gülenist Terror Group (FETÖ) Fetullah Gülen lives.

Turkey has taken diplomatic steps after Aytaç was sent back to Nigeria. Turkish authorities demanded his extradition from the Nigerian government.

Önder Aytaç, one of the sharpest pens at FETÖ's service, went to the U.K. on Nov. 17, 2014, and later moved to the U.S.

FETÖ is the terror group behind the failed July 15 coup attempt in Turkey and a string of crimes including two previous attempts to overthrow democratically-elected governments, money laundering, sham trials and imprisonment of its foes thanks to its infiltrators within the police and judiciary systems.

FETÖ also runs a global network of schools, from Africa to Central Asia, where it recruits more followers into the group.