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Assault and death in Lyon
On Feb. 12 in Lyon, 23-year-old student Quentin Deranque was severely beaten after clashes outside a Sciences Po event and later died of his injuries.
“A student, Quentin Deranque, was fatally beaten in Lyon after clashes on Feb. 12.”
Witnesses and video show masked attackers surrounding and repeatedly kicking people.
Deranque collapsed, was hospitalized in a coma, was declared brain-dead, and died two days later.
Sources describe him as helping the right-wing feminist collective Némésis at the demonstration, and authorities opened a probe that was reclassified to include aggravated fatal blows or "voluntary homicide with aggravated violence."
Arrests and aide inquiry
Police investigations quickly led to multiple detentions and the suspension of at least one parliamentary aide.
GB News and the BBC report nine people arrested, while Il Sole 24 ORE says six people in their early 20s were detained.
Earlier reporting in Brussels Signal recorded no arrests at that stage.
Among those identified by several outlets is Jacques‑Élie Favrot, described as a parliamentary assistant to an LFI deputy.
Favrot has stepped back from duties and been barred from the Assemblée nationale while investigators examine witness testimony and video evidence.
Investigation into fatal assault
Prosecutors opened inquiries into aggravated violence and, in some reports, "voluntary homicide with aggravated violence," while autopsies and post‑mortems found fatal skull and brain injuries.
“post-mortem exams found fatal skull and brain injuries.”
Several outlets report investigators are examining links to the now‑dissolved La Jeune Garde (Young Guard) and other far‑left militants.
At the same time, LFI and its leader Jean‑Luc Mélenchon have denied organisational responsibility and called the accusations libelous.
Video and witness testimony are central to the probe, with police reviewing footage to identify who struck Deranque.
Political fallout after killing
The killing has produced sharp political fallout.
Government ministers and right-wing leaders blamed the "ultra-left" or far-left and called for harsh measures or the dissolution of extremist groups.
National political debate intensified ahead of municipal elections.
President Emmanuel Macron and Justice Minister Gérald Darmanin condemned the violence.
Opponents including Marine Le Pen and Jordan Bardella blamed LFI politically.
LFI and Mélenchon reiterated denials, described the accusations as libelous, and warned against exploitation of the tragedy for political ends.
Contested accounts and reactions
Accounts remain contested and some details differ across reports; media cite video evidence and multiple witness statements while noting disputes over whether groups prepared attacks in LFI premises or whether former youth groups acted independently.
“More than 15 witnesses have given statements and police are reviewing video to identify the perpetrators.”
Several outlets stress that investigations are ongoing and that some claims — for example, alleged preparations inside party premises — remain contested.
The case has also prompted public demonstrations and tributes calling for the dissolution of militant groups named in coverage.