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.

Man charged with 10 counts of attempted murder after knife attack on UK train
Tanzania's Hassan sworn into office after deadly election violence
Powerful 6.3 quake kills at least 20 in Afghanistan, hundreds injured
Turkey set to call for action on Gaza as soon as possible, source says
Hamas hands over three more hostage bodies
India federal agency freezes Anil Ambani Group's $351 million properties
Israeli strike kills one in Gaza as sides trade blame for truce violations
UK police say mass stabbing on train not terrorist incident, two arrested
