A lorry has driven through a crowded Christmas market in the centre of Berlin, killing several people and leaving more than 50 injured.

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Video of the aftermath showed people helping the injured on the ground.

Police said on Twitter that the truck rammed into the market outside the capital's popular Christmas market at the Kaiser Wilhelm Memorial Church.

Bild newspaper posted a picture of a large Scania truck with its windshield smashed out on the sidewalk alongside the market.

Eyewitnesses on social media reported hearing a big bang as the lorry entered the square.