Nightly News | September 22, 2012
>>> headlines tonight. this time in the netherlands where a sweet 16 party became anything but sweet as thousands of uninvited guests showed up followed by the riot police .
>> reporter: the guests, uninvited, quickly became unpleasant and wouldn't leave without a fight. what was supposed to be a sweet 16 turned horribly sour. police officers attacked with rocks and bottles, cars set alight. many the small dutch town, 34 people were arrested and three seriously injured after a long night of violence. it all started when a teenaged girl hit the wrong button. her name is marta and she only wanted to invite a few friends on facebook but left her message wide open . the invitation went viral with its own youtube video and famous d.j.s spreading the word on twitter, social media leading to anti- social behavior . the sweet 16 was soon called project -- the name taken from a movie about an out of control party. last year 1500 people arrived at a party in germany. in australia, more than 100,000 rsvp'd to a sweet 16 . at least they didn't turn up. back in the netherlands this is the damage caused by just a few thousand. it's one big mess, this woman says. a mess maybes have spent all day trying to clean up. the town's mayor calls the rioters scum. marta and her family were moved to safety before the crowds arrived. the birthday girl may not have been there but this is a party she'll never forget. nbc news, london.