A lorry ploughed into a crowd of people gathered at a Christmas market in the German capital of Berlin, killing at least nine people, according to Berlin police.
The lorry on Monday rammed into the market outside the popular market at the Kaiser Wilhelm Memorial Church.
At least 50 people were injured, police said.
Ambulances and heavily armed officers rushed to the area after the driver mounted the pavement of the market in a square popular with tourists,
Police later arrested the suspected driver near the scene, and said that another passenger “riding in” the lorry had died. The lorry had a Polish license plate, police said.
Heiko Maas, Germany’s justice minister, said that federal prosecutors, who handle terrorism cases, are taking over the investigation.
He did not give further details in a post on Twitter on Monday night about the “shocking news” but added “we are mourning with the relatives” of the victims.
Interior Minister Thomas de Maiziere said he was in constant touch with security authorities, but didn’t give any indication in a statement whether they believe the incident was an accident or an attack.