Student groups in Quebec have filed a legal motion against a provincial law aimed at ending more than three months of protests over proposed tuition hikes.

Lawyers for the students and other groups filed the motion Friday in a Montreal courtroom Friday.

More than 150,000 students in universities across Quebec have been on strike since February to protest the proposed tuition raise. Street protests have ended in clashes with police and more than 2,500 students have been arrested.

Quebec Premier Jean Charest's government passed the emergency law on May 18 in an attempt to restore peace, but the protests have only intensified.

The law requires police notification eight hours ahead of any protest of more than 50 people, among other regulations.

The student groups claim the law is unconstitutional.