Police in Athens arrested a priest who threw acid on seven bishops of the Greek Orthodox Church.
Greek police said the attack occurred on Wednesday afternoon during a meeting which discussed disciplinary measures against the 36-year old priest.
Three bishops are being treated in a hospital for extensive burns on their faces.
During the attack, a police officer was also injured when he tried to intervene to assist the bishops.
ANA news agency reported that the priest risked being suspended from the Church after he was accused of involvement in drug trafficking. The bishops were meeting to discuss his expulsion from priesthood after he was allegedly caught with 1.8kg cocaine in June three years ago.
The priest took with him a bottle filled with acid to the meeting at the Petraki Monastery, in central Athens, and threw acide on the bishops.
Greek Health Minister Vassilis Kikilias visited the victims in hospital and indicated that one of the bishops will be transferred to another hospital for plastic surgery.