Protesters have climbed on to the top of the Libyan embassy building in London, police have said.

Officers were alerted at around 2.50am after a small group of people gained access to the roof of the building in Knightsbridge.

A Metropolitan police spokesman said: "They removed a flag from the flagpole and attempted to replace it with another. At present those on the roof remain there.

"It is believed there are up to five people on the roof."

Protesters have gained access to a room near the roof, but not the main building.

Two men, aged 25 and 26, who also tried to climb the building, were arrested on suspicion of attempted trespass on diplomatic premises and have been taken to a London police station.

Police said they were speaking with the group in an attempt to "secure a safe resolution".