Morsi, Egypt's first freely elected leader, was ousted in July 2013 by then army chief and now President Abdel Fattah al-Sisi after mass protests against his sole year in office.
Since his removal, a relentless government crackdown against all kinds of dissent -- mostly on Morsi supporters -- has left hundreds dead in street clashes and thousands jailed.
Many more have been sentenced to death following mass trials, described by the United Nations as "unprecedented in recent history".
Today, the Paris-based International Federation of Human Rights (FIDH) released a report, based on testimonies of victims, activists and witnesses, charging that sexual violence against detainees has surged since the ouster of Morsi.
"The scale of sexual violence occurring during arrests and in detention, the similarities in the methods used and the general impunity enjoyed by the perpetrators point to a cynical political strategy aimed at stifling civil society and silencing all opposition," said FIDH President Karim Lahidji.
It said such violence is widely tolerated by the authorities, with perpetrators, be they state-employed or civilian, rarely having to answer for their crimes.
"While tolerating these crimes, Sisi's regime has also hijacked the fight against sexual violence as a pretext to tighten state security," the report said.
"The Egyptian government must immediately put an end to these crimes, committed by actors under their direct authority," said Amina Bouayach, secretary general of FIDH.