Fires have broken out at several schools in France, as students protest by blockading education institutions nationwide over school funding and studying conditions.

Blazes were reported at two high schools in Nantes, western France, while another was filmed engulfing the entrance of a school in the northern city of Rouen.

Students are protesting about a lack of teachers and staff, overcrowded classrooms and run-down buildings. University students joined the demonstrations on Thursday, citing similar demands.

The interior ministry said 1,949 people had been arrested on Thursday, with 305 police officers injured. Prime Minister Sébastien Lecornu held a crisis meeting on Thursday to discuss the unrest.

The government said afterwards that the student-led demonstrations had descended into "urban violence".

Both fires in Nantes spread after a bin was set alight. The blaze at the Nelson Mandela high school, in the city centre, then spread to the front of the building, damaging the entrance hall.

In the southern city of Marseille, staff at Victor Hugo high school were splashed with petrol as protesters reportedly filled containers.

While in the north, a headteacher at Degrugillier high school, in the village of Auchel, was injured in the ear by a wayward firework.

The blockades and protests at French lycées - for 15-18 year olds and equivalent to sixth forms in the UK or high schools in the US - began last week before spreading to hundreds of schools across the country.

So far, 1,027 lycees have been affected by demonstrations, with blockades at 222 of them, according to the interior ministry.

At least 30 universities have also reportedly been blockaded, including campuses in Rennes and Paris.

On Thursday, public transport services in Marseille and Strasbourg were halted due vandalism, threats of violence and to hinder protesters from moving around.