At least six people are believed to have been killed in a shooting rampage in a shopping centre in the German city of Munich, a police source said.
Three armed assailants were involved in the shooting, said a police spokesman citing witnesses.
The Bild newspaper reported that the gunman ran through the mall near the Olympic stadium in the southern German city, firing on several people before fleeing in the direction of a nearby metro station.
The DPA news agency, citing a Munich police spokesman, said several people were dead.
Europe has been on alert for terrorism in the wake of a string of attacks.
The OEZ shopping centre was surrounded by police who were hunting for the attacker, the paper said.
“There is a major police operation under way in the shopping centre,” Munich police said on Twitter, urging people to avoid the area.
Emergency vehicles were seen in the streets outside, as passers-by looked on.
“Attention — avoid the neighbourhood around the OEZ. Stay in your homes. Leave the street,” the Munich police tweet said.
Germany has so far escaped the kind of large-scale jihadist attacks seen in neighbouring France.
But the shooting comes just days after a teenage asylum seeker went on the rampage with an axe and a knife on a regional train in Germany on Monday, injuring five people, two of them critically.