The Journalists' Syndicate will hold a conference on Monday to address the disappearance of several activists and journalists at the hands of security forces over the past several months.
The conference is being coordinated with several human rights advocacy groups. It comes days after the syndicate accused security forces of causing the disappearance of three of its members.
Victims' relatives will also speak at the event.
Political and human rights activists have increasingly become critical of warrantless arrests and the disappearance of activists since Sisi's election in 2014.
Freedom for the Brave, an independent group offering support to political detainees, reported 164 cases of forced disappearances between April and June 2015, numbers that were backed by the National Council for Human Rights.
