Egyptian authorities have arrested up to 57 people, including 22 in the past three days, in a campaign against homosexuals after rainbow flags were raised at a concert, rights groups say.

Those detained on suspicion of homosexuality will be subject to anal examinations, a move decried by rights groups. Five anal examinations have already taken place, according to Amnesty International.

While homosexuality is not explicitly prohibited by the terms of Egyptian law, the arrested were detained on charges of inciting debauchery, sexual deviancy and violating public morals.

Lawyer Doaa Mostafa who attended the interrogations with a detained girl said that the hardest thing wasn’t the irrelevant questions. However, it was when the girl knew that she was going back to a prison cell where she is allegedly sexually assaulted by other prisoners.

Association for Freedom of Thought and Expression Lawyer Ahmed Othman added that the interrogations continued for more than 10 hours. He said that the defendants were asked about their religious and political views. Additionally, passwords to their social media accounts were taken and their messages were examined. Read more via Egyptian Streets