A haul of weapons, including CS gas, stun guns and knives, was found at a home in Bermondsey, south-east London.

Police said the property was selling the weapons to gangs, some of whom may be planning to target the Notting Hill Carnival later this month.

A 17-year-old boy was arrested for possession of prohibited weapons.

By running an operation before carnival gets under way, we aim to disrupt and stop criminals and troublemakers from going to the event Ch Insp Jo Edwards

He was subsequently released on police bail, to return in October pending analysis of a substance.

Officers found 22 CS gas canisters, eight stun guns, a gas-powered handgun and silencer, an extendable baton, a flick knife and cannabis.

Police said the occupiers of the property are suspected of selling CS gas and stun guns to criminal gangs in the Peckham area.

The operation was part of a move by the Metropolitan Police to disrupt criminals intent on breaking the law at the Notting Hill Carnival.

Last month two men were arrested in Peckham; one on suspicion of possessing CS gas, the other for an alleged drugs offence, as part of the same operation.

Four addresses in the neighbourhood were searched and officers recovered a replica 9mm handgun, two CS gas canisters, �3,000 and class A drugs. Both men have been released on police bail.

Ch Insp Jo Edwards said: "By running an operation before carnival gets under way, we aim to disrupt and stop criminals and troublemakers from going to the event."