Egyptian authorities have arrested at least 22 people in the past four days as part of a campaign against LGBT people, Amnesty International says.
Thirty-two men and one woman have now been detained since rainbow flags were displayed at a pop concert in Cairo last month, according to activists.
Anal examinations have been reportedly carried out on five of those arrested.
The flag-raising provoked a public outcry and prompted the public prosecutor to order an investigation.
Homosexuality is not explicitly criminalised under Egyptian law. But the authorities routinely arrest people suspected of engaging in consensual homosexual conduct on charges of “debauchery”, “immorality” or “blasphemy”.