One person has been killed and several injured in a knife attack in a Hamburg supermarket, German police say.
Hamburg police said on Twitter that one suspect had been arrested but that it was too soon to pinpoint a motive.
Bild newspaper published a photo of a man purported to be the attacker covered in blood.
The attack happened in the Barmbek region in the north of the city.
Witnesses said the attack happened at a branch of Edeka, Germany’s largest supermarket chain.
Speculation in German media said the attack may have been part of a robbery attempt but police said that that motive could not be confirmed.