April 6 Youth Movement has condemned the security forces for breaking up its sit-in outside the Shura Council (Egypt's upper house of parliament) early on Monday morning.
The youth group began the sit-in on Sunday to call for the release of fellow members detained at an earlier protest.
Security forces acted after the group refused to move away from the vicinity of the cabinet building, April 6 spokesperson Khaled El-Masry said.
Security forces threatened to make arrests, the group asserted in a statement.
A protest will take place on Monday outside the New Cairo courthouse where the Fifth District prosecution will decide whether to renew the detention of April 6 members detained at an earlier protest.
Three of the group's members and one other protester were detained in late March following a demonstration outside the interior minister's residence. They were arrested for chanting against the interior ministry and describing it as a "prostitute."
The group says the act was a 'misdemeanour' that does not require keeping those arrested on remand.
On Monday, April 6 said the daughter of Amal Sharaf, a leading member of the group, had been abducted from outside her family home in Giza's Agouza while her mother was at the sit-in.
Sharaf's daughter was physically and verbally assaulted at a nearby garage, according to the April 6 Facebook page.
The girl claimed abductors told her it was a warning to her mother to stop protesting.
Sharaf has strongly condemned the incident via Twitter and vowed to retaliate.