At least 21 people including Alparslan Kuytul, president of the Furkan Foundation and leader of a religious group critical of the Turkish government, were detained by a group of anti-terror police, several Turkish media outlets reported.

Kuytul and other detainees are reportedly accused of “disturbing public order” and “establishing a criminal organization.”

Units from the police’s anti-terror and anti-smuggling and organized crime departments reportedly raided the headquarters of the foundation in Turkey’s Adana province and home addresses of the suspects early on Tuesday morning, forcing open its doors and storming the premises.

The police also raided the foundation’s branches in the Central Anatolian province of Niğde and the eastern province of Elazığ.