Montreal students and supporters are preparing to mark the 100th consecutive day of protest against planned increases to tuition fees for university courses.

Thousands of people are expected to take to the streets today (Tuesday) in a mass rally both against the fee increases, and in solidarity with those who have been arrested during the protests so far, despite the government making the demonstrations illegal.

On Sunday as many as 300 people are thought to have been arrested, as well as 20 injured, as police clashed with students and used batons and pepper spray on the demonstrators. Protesters reportedly responded by ripping large slabs of cement out of the roadway and throwing them at the police, who used percussion bombs and tear gas.

There were also reports of students throwing Molotov cocktails at police. A fire was lit in the middle of a main street, as well as a fire hydrant being burst which caused flooding of a nearby building.

Police spokesman Ian Lafreniere said, “I don't think we have seen this many arrests at one time”, he also estimated that overall, police have made close to 2,000 arrests since the beginning of the student protests in February. He also said that approximately 250 rallies had taken place since then.

Video shows an estimated 10,000 students and supporters marching through downtown Montreal in defiance of the imposed Bill 78 banning protests.