A man wielding a knife has fatally stabbed four officers at police headquarters in Paris
The attacker was shot dead at the scene by a police officer, according to a statement by the Alliance police union.
There are reports that the suspect worked in building in an administrative capacity.
There has been no official word on the motive for the attack, which took place near to Notre-Dame de Paris cathedral.

Tanzania's Hassan declared landslide winner in election marred by violence
Vietnam's ancient town Hoi An works to restore tourism after devastating floods
Indian temple stampede kills nine, injures several
Turkey to host Gaza meeting amid ceasefire concerns
Tanzania opposition says hundreds killed in vote protests
