Egypt’s Supreme Constitutional Court, which dissolved parliament last month, is due to discuss how to respond to President Mohammed Mursi’s order to reconvene it.
The speaker of the dissolved house has called for it to meet on Tuesday.
Military and judicial authorities have held emergency talks, but have not announced any action so far.
Mr Mursi, whose Muslim Brotherhood won most seats, said the chamber should reconvene until a new election is held.
Military police are keeping the area around the parliament building sealed.