AFP

French detectives on Friday referred the investigation into a knife rampage by a staffer at Paris police headquarters that left four colleagues dead to anti-terrorist prosecutors, sources said. Three police officers and an administrative worker -- three men and a woman -- died in the frenzied 30-minute attack on Thursday at the police headquarters. The assailant, a 45-year-old computer expert, was eventually shot dead by police. The attacker, named as Mickael H, was born on the French overseas territory of Martinique in the Caribbean. Preliminary enquiries suggest that the attacker, a convert to Islam, could have become radicalised, said sources, who added that he had worked in a section of the police service dedicated to collecting information on jihadist radicalisation.