BBC Online :
A man has attacked a number of people with a knife at a market square in the south-west German city of Mannheim, police say.
The incident was caught on a YouTube livestream and showed the attacker stabbing a man, and then a police officer who went to help. He is in a critical condition.
The attacker was shot and injured by another police officer.
Unconfirmed reports suggest one of the people injured was a far-right anti-Islam activist who had been holding a rally in the square.
Police in Mannheim tweeted about a “major police operation” in the city’s market square and a rescue helicopter was sent to the scene.
One person attacked several others with a knife, injuring them, at 11:35 (10:35 BST), police said in a follow-up statement.
A firearm was then used against the attacker, it added.
The attack is understood to have happened at the same time as a rally in the market square hosted by far-right anti-Islam activist Michael Stürzenberger.
His organisation, the Citizens’ Movement Pax Europa (BPE), confirmed to Bild newspaper that Mr Stürzenberger had been injured in the attack.