Alpaslan Demir, a US-Turkish dual citizen who is the copyright owner of the encrypted communication app ByLock, has been placed in pre-trial detention in Turkey over terror accusations, the state-run Anadolu news agency reported.

According to the agency, Demir returned to Turkey from the USA voluntarily on June 9, 2021 and then subsequently jailed by an İstanbul court.

Turkish authorities believe that ByLock is a communication tool among followers of the Gülen group, accused of mounting the July 15, 2016 failed coup attempt. The group denies involvement.

Tens of thousands of people, including civil servants, police officers, soldiers, businessmen and housemakers, have either been dismissed or arrested for using ByLock since the failed coup attempt on July 15, 2016.