Ahmet Şan, the chairman of Atiker Konyaspor, the main team from Turkey’s central Anatolian province of Konya was briefly detained as part of an investigation into the Gülen movement, which the government accuses of masterminding the July 15, 2016 coup attempt.

The movement denies involvement.

According to media on Monday, Şan was detained on accusations of having used ByLock, the controversial mobile application which Turkish authorities claim once-primary communication tool among the followers of the movement.

Police searched Şan’s home and seized his cell phone and other digital belongings. He was released after his interrogation, according to media.

Tens of thousands of civilians have been arrested for using ByLock since the failed coup attempt on July 15, 2016.