London, Nov 3 :More than a hundred gatecrashers wreaked havoc in a Brit family home after the details of a teenager''s house party were posted on Facebook.

The party was hosted by 16-year-old Joanna Zell while her parents were off to Austria.

The gatecrashers smashed windows, ruined carpets, took drugs, and indulged in a messy egg fight at the house in Bickley, near Bromley.

"It got out of control,” the Telegraph quoted a partygoer, as saying.

"People were having sex in bedrooms, smoking cannabis and wrecking the front garden,” the partygoer added.

Joanna was forced to call police and disperse the crowd.

Dr Michael Zell, a history lecturer at the University of Greenwich in London, and his wife were on holiday in Vienna at the time and only learned of the mayhem as they prepared to return home the following day.

"Joanna said she wouldn''t have a party but she did,” Mrs. Zell told Daily Telegraph.

"She invited 50 classmates but 150 people turned up. There was some sort of gang that had nothing to do with anybody else.

"We don''t know whether it was Facebook-related.

"Somebody seems to be confident it has gone up on the website.

"Joanna rang the police herself so she doesn''t feel huge guilt for it. That''s probably healthy. She feels she did not invite this problem," she added.

Talking about the havoc created, Mrs Zell said: “There were several raw eggs in the house so they had an egg fight.

"I''m sure it was great fun but rather hard to clean up afterwards.

"The carpets are wrecked, the windows broken and there are all sorts of cigarette burns. I didn''t see the sheets because they were all washed quite a lot.

The Joanna also lost her three-figure sum of birthday savings and her mother lost jewellery. (ANI)