Police have found loaded semi-automatic gun at an address in South Norwood. Officers searched a property in Tennison Road on Monday afternoon.
A firearm was found and three people - two men - both aged 25, one woman - aged 24 - were arrested.
Police raided a coach carrying Crystal Palace supporters today and arrested two men and seized quantities of alcohol.
Officers from Operation Arrowtip, a Metropolitan Police initiative tackling football hooliganism, stopped the coach at around 8am in South Norwood Hill, South Norwood, south London.
One man was arrested on suspicion of possessing Class A drugs, Scotland Yard said. A second was held under the Explosives Act for possession of pyrotechnics.
He was also found to be in possession of a substance believed to be Class A drugs.
Both men were taken to a south London police station, where they remain in custody.
A lock knife was seized, together with five bin-bags of beer, cider, wine and spirits.
Two police officers have been describing how they smashed down the door of a burning building, risking their own lives, to rescue two men and a two-year-old boy.
They were driving through South Norwood yesterday morning, when they saw the emergency.
Liz Wickham has the story:
The Croydon Borough commander has paid tribute to the bravery of the two police officers involved in the South Norwood fire rescue.
One of the police officers, who helped three people from a burning building in South Norwood yesterday, has described how he and his colleague became involved in the rescue.
Two police officers have rescued two men and a two-year-old boy from a burning flat in Croydon.
DS Mick Woollard and DC Neal Pryce, both from the Metropolitan Police's Road Death Investigation Unit at Catford, were on South Norwood High Street at 11am, when they spotted the fire in a flat above a shop.
The officers broke down the door of the flat and helped to get the three people inside to safety. One of the men and the child were treated in hospital for the effects of inhaling smoke. Neither were serioulsy hurt.