French police suspend use of stun grenades after high-school protester loses hand

France is suspending the use of stun grenades by police at high-school demonstrations, the interior minister has said, amid mounting accusations of police brutality during a fortnight of protests marred by often violent clashes that have injured hundreds.

Laurent Nuñez told RTL radio on Wednesday that he had ordered a temporary halt to the use of the grenades “in the context of the high-school students’ movement” after a 15-year-old lost a hand during a protest in Lens, northern Fance, on Monday.

Authorities have not confirmed the exact circumstances – in particular, whether the boy had picked the grenade up or had been struck by it – but said up to 200 protesters had been hurling projectiles at police when the riot squad intervened.

Nuñez said he was suspending use of the grenades “until we know exactly what happened”.

The boy’s mother said on Wednesday that her son’s hand had been amputated. She told BFMTV: “His life has been stolen. He’s a 15-year-old kid, how can children be treated like that?” She said her son had not tried to pick the grenade up.

At least 215 teenagers and 85 school staff have been injured since the start of the protests over chronic teacher shortages, crowded classes, dilapidated buildings and long school days. About 750 police offers have also been wounded.

Nuñez said 18 internal police investigations have been launched over allegations of brutality during the demonstrations, including incidents in which young protesters have lost multiple teeth and one lost the use of an eye.

He said inquiries were always opened over accusations of “non-proportional” policing, but insisted officers were there to protect the students. Rights groups and trades unions have repeatedly accused the police of using unnecessary force.

The decision came a day after at least 250,000 pupils, parents, teachers and unionists took to the streets in cities across France on the biggest day yet of the campaign, prompting the president, Emmanuel Macron, to hold an emergency cabinet meeting.

Most marches passed off without serious incident, but some – including in Paris – ended in sporadic vandalism and running skirmishes with riot police, with officers firing teargas and carrying out baton charges to disperse protesters.

The prime minister, Sébastien Lecornu, is due to make a speech on Wednesday on the demonstrations as well as the dire state of the country’s finances, which is severely constraining the government’s capacity to act on the protesters’ demands.

Lecornu on Tuesday condemned the violence and told parliament it could not be tolerated, while also rejecting accusations that the government had ordered “police repression” against the protesters.

Over the past fortnight demonstrators have set dustbins on fire outside their schools, destroyed bus shelters and hurled projectiles at riot police, who have responded with batons, teargas and riot-control rounds.

Twenty-four schools have been burned or ransacked, while more than 6,500 people have ​been arrested, almost all of them minors. More than 1,800 are being prosecuted, nearly 1,500 of them under 18, the justice ministry has said.

Anne Savinel-Barras, the president of Amnesty France, said earlier this week that images and testimony from the protests “raise alarming concerns about the dangerous use of teargas, batons and policing techniques”.

The education ministry said classes had been wholly or partially suspended in 528 of the country’s 3,700 lycées – high schools attended by pupils aged between 15 and 18 – on Wednesday, a significantly lower number than on Tuesday.

The protests, months before key presidential elections to choose Macron’s successor, have rattled a government trying to reduce a ballooning budget deficit amid mounting investor concern over France’s ​sky-high debt and weak economic growth.

They have also sparked a heated political row, with the government accusing the radical-left La France Insoumise party of encouraging and even orchestrating the movement after numerous LFI MPs attended school blockades.

The party’s veteran leader and presidential candidate, Jean-Luc Mélenchon, has strongly supported the protests, while urging non-violence.