An Istanbul court put in pre-trial arrest six human rights activists including Amnesty International’s (AI) Turkey director Idil Eser, on early Tuesday.

Turkish police, acting on an anonymous tip, raided a hotel on Büyükada, one of the Princes’ Islands off İstanbul, and detained Eser from AI, İlknur Üstün from the Women’s Coalition, lawyer Günal Kurşun from the Human Rights Agenda Association, lawyer Nalan Ekrem from the Citizens Assembly, Nejat Taştan from the Equal Rights Watch Association, Özlem Dalkıran from the Citizens’ Assembly, lawyer Şeyhmuz Özbekli, and Veli Acu from the Human Rights Agenda Association. Two foreign trainers — a German and a Swedish national — as well as the hotel owner, who was later released, were among the detainees.

The court overseeing their case ruled to arrest Eser along with 5 other activists: Dalkıran, Acu, Kurşun, trainees Ali Garawi and Peter Steudtner. The accusation raised against them was “to abet a terrorist organization.”

The court released Ekrem, Özbekli, Taştan and Üstün on judicial control.

Taner Kılıç, a lawyer and chairman of AI’s Turkey’s board, was earlier arrested on June 9, accused of links to the alleged mastermind of a failed coup attempt on July 15, 2016, Fethullah Gülen, who has denied any involvement.