Thousands of revellers descended on a small Dutch town sparking a riot after a party invitation posted on Facebook went viral, authorities said Saturday.
Prosecutor Hessel Schuth said 34 people were arrested Friday night and in the early hours of Saturday morning and would be prosecuted for public order offences. Several people were injured, but none were believed to be seriously hurt.
"Scum ran amok in our town," said Rob Bats, mayor of Haren, 185 kilometres north of Amsterdam.
"An innocent invitation on Facebook for a party led to serious rioting, destruction, plundering, arson and injuries in the middle of Haren," he said.
Bats said an initial analysis showed a core group of rioters "were very violent and well-prepared and deliberately sought confrontation" with hundreds of police who had been dispatched to the town amid fears of trouble.
Dutch media reported that the party originally was planned as a small celebration by a 16-year-old girl but her invitation went viral when she posted it on Facebook.
Some of the people arriving in Haren on Friday wore T-shirts emblazoned with "Project X Haren," a reference to the film "Project X" that portrayed an out-of-control party.
On Saturday, another Facebook group sprang up called Project Clean-X Haren, urging people to help clear up the debris littering the town's streets.