Riot police have used batons to disperse hundreds of people after an alleged illegal rave in central London.
Officers blocked off Black Prince Road on Albert Embankment after reports a fire had broken out at a building near Lambeth fire station on Halloween night.
There were dramatic scenes as riot police with dogs and shields drew their batons against a charging crowd, some of whom threw bottles and shouted "Scum".
London Fire Brigade said they had received a report of a fire alarm but that there was no blaze.
A witness said: "It was mayhem. There was traffic chaos as police blocked the road."
Most of the crowd had dispersed just before 12.30am, while those who remained chanted at officers.