A person is preventing for his life in hospital after having a cardiac arrest on Westminster Bridge in London.

Police have been known as to the bridge close to the Homes of Parliament to an alleged struggle at about 10.45am on Sunday.

Preliminary studies from central London mentioned that the person had been stabbed however the Metropolitan police later mentioned this was incorrect.

Detectives are investigating how the person got here to endure a cardiac arrest. He was nonetheless in hospital, in a vital situation, on Sunday night.

London air ambulance and the London ambulance service attended the scene together with police.

Three individuals have been arrested on suspicion of tried homicide, and one individual on suspicion of affray. Two of these arrested have been taken to hospital with head accidents.

Police have urged anybody who witnessed the occasion to come back ahead, and requested anybody who has CCTV, cell phone or dashcam footage to contact officers.

Anybody with data or footage can contact police on 101, quoting crime reference quantity 2468 of 24 November.

Alternatively, they will contact the impartial charity Crimestoppers anonymously on 0800 555 111.