Muslim students are demanding their embassies lobby City University to overturn a ban on them using their prayer room.
The University, which has students from Muslim countries including Bangladesh, Iran and Pakistan, padlocked the prayer room on Whiskin Street because of security concerns after six Muslim students were attacked in November.
Hundreds of male members of the Islamic Society (ISoc) have been gathering twice a day to pray in Northampton Square in protest. Up to 400 students have been attending sermons in the square during Friday prayers.
The University have offered the students space in a multi-faith prayer room, but the students say they cannot use a space that is shared by all faiths.