Actor Tom Hardy has reportedly performed a citizen's arrest on a moped thief after chasing him through gardens and a building site in London.

The Hollywood star, 39, looked like he "switched into superhero mode" as he chased the man near his home before checking him for weapons in Richmond, south west London, a witness told The Sun.

The onlooker said two males jumped a red light before crashing a £50,000 Mercedes.

Arun Pullen, 22, said: "Tom must have been walking down the road. He went off like a shot in pursuit and looked furious."

He added: "I asked Tom what happened and he told me he chased him through my back garden and caught him around the block - but the route was like an assault course."

The Batman and The Revenant star, who recently co-wrote and appeared in BBC drama Taboo, then reportedly performed a citizens arrest on one of the suspects.

Two suspects were detained in connection with the theft, the newspaper said.

Mr Pullen's girlfriend, Kalisha, a fan of the actor, said: "There was no mistaking him."

A spokesman for the actor declined to comment.