A Frenchman who killed his boss and pinned his severed head to a fence at an industrial gas factory has committed suicide in his jail cell, prison authorities said Wednesday.

A Frenchman who killed his boss and pinned his severed head to a fence at an industrial gas factory has committed suicide in his jail cell, prison authorities said Wednesday.

Yassin Salhi, 35, hanged himself from the bars of his cell using electrical cable on Tuesday night, according to authorities at Fleury-Merogis prison, in the southern suburbs of Paris.

The deliveryman carried out the grisly attack on employer Herve Cornara in Isere, southeastern France in June, displaying his boss's head outside the plant surrounded by extremist flags.

After sending pictures of the scene to a friend who had left to join the Takfiri groups in Syria, he tried to blow up the facility by driving his van into gas canisters, but was arrested and remanded in custody.

Salhi had been placed in solitary confinement but was not considered a suicide risk.

Prison authorities had previously said he hanged himself using bed sheets.
He had always disavowed any religious motive for his crime, saying it was a personal dispute with his boss, but prosecutors were pressing charges of extremist-related terrorism.