Detectives have launched a murder investigation tonight following the death of a man following a fight on board a London bus.

Police were called at 8.45pm to an incident in east London on Monday when two men were reported to be fighting at Parnell Road in Bow.

An ambulance crew called to the scene after a 999 call found an unconscious man believed to be aged in his late 60s.

He was taken to the Royal London Hospital at Whitechapel where he later died.

His next-of-kin are in the process of being notified. Formal identification and a post-mortem examination are to be held.

A fight broke out between the dead man and another man on a 488 bus, detectives from the Met’s Homicide and Major Crime Command believe.

Both men got off in Parnell Road, off Bow Road, where the fight continued. But one of the men collapsed on the pavement.

A 73-year-old man was arrested near the scene on suspicion of GBH who currently remains in custody at an east London police station where he is being questioned.

Detectives are appealing for witnesses on the 488 bus or in Parnell Road on Monday evening or anyone with information to contact the Incident Room on 020-8345 3985 or on Twitter @MetCC, alternatively Crimestoppers anonymously on 0800-555111.