HAMBURG, Germany, June 5 (UPI) -- Around 1,500 people responding to a Facebook birthday party invitation in Germany invaded a Hamburg neighborhood and clashed with police, authorities said.
The crowd showed up after a 16-year-old girl posted an invitation to the party for family and friends on the social networking site and accidentally listed the party as a public event, the Hamburger Morgenpost reported Sunday.
More than 15,000 people responded confirming they would attend, and although the 16-year-old attempted to correct the mistake by posting a cancellation on Facebook, hundreds of young Germans began arriving the evening of the party from Hamburg and around the country.
Police were forced to cordon off the home where the party had been scheduled.
As the unruly crowd celebrated, police made 11 arrests as they attempted to clear the surrounding streets, Deutsche Welle reported.
Before the party was finally broken up in the early morning hours, one officer sustained minor injuries and a number of revelers were taken to a local hospital and treated for alcohol poisoning, Hamburg police said