Paris: Four police officers were on Thursday stabbed to death at Paris Police headquarters, a BBC report said.

According to the report, a knife-wielding attacker was also killed during the incident.

The incident happened around 1 p.m. (local time) in the courtyard of the police building, which is located close to the Notre-Dame cathedral.

The attacker, who was reported to be a member of staff inside the building, was shot dead by a policeman shortly after the assault, the BBC reported.

The police headquarters was evacuated and a perimeter of security was put in place.

The area in the île de la Cité — in the centre of Paris was sealed.

It comes a day after the French police went on strike across the country over increasing violence towards officers and rising suicide rates within the force.

(With IANS inputs)