Five people have been killed and others wounded in a shooting at a youth welfare centre in the northern German city of Stade, according to police.

Two suspects were detained following the shooting on Monday, one of whom is believed to be the alleged attacker. The motive is not clear.

“Homicides involving multiple victims occurred at a youth welfare facility,” police said. “Five people were fatally injured and additional individuals sustained injuries.”

Police in Stade said a major operation was being conducted on Dankersstrasse, a street south of the city centre. People were urged to avoid the area and follow the instructions of the emergency services.

Stade is about 40km (25 miles) from Hamburg with a population of half a million.