An injured man has barricaded himself with a weapon in a restaurant in the west German city of Saarbruecken.
The man, a relative of the restaurant's owner, entered it on Sunday morning and sent all the cleaning staff outside, said police.
The man, who was not further identified, is probably suffering from psychological problems.
Police do not yet know exactly what kind of weapon he has and officers are trying to convince him to end the stand-off.
Police said the man did not take any hostages and terrorism was not an issue.
It was not clear why he was injured.