Danish police have clashed with hundreds of rioting youths in the capital, Copenhagen.
The makeshift youth centre was demolished in March
Protesters threw stones and set cars ablaze. About 25 people were detained as police used tear gas to disperse the rioters in the Noerrebro district.
The unrest came as youths demonstrated to mark six months since a local youth centre was closed.
Squatters running the centre were evicted from the building by an anti-terror squad on 1 March.
About 650 people were arrested in clashes between protesters and police before Ungdomshuset, or Youth House, was demolished on 5 March.
Police spokesman Mads Firlings said these latest riots had eased by early Sunday morning.
"It's six months since we cleared the house there, and they want to show they've not forgotten," Mr Firlings said.
"Almost immediately they started building barricades and throwing rocks through the windows of shops and banks."
Ungdomshuset had been occupied by youth activists since the 1980s.
In 2000, the local government sold the building to a Christian group that obtained a court order to evict the squatters.
But the activists vowed not to leave, saying the council had no right to sell the building while it was still in use.