A London man who was killed by a London Underground train was on the track at Old Street to hoist his brother to safety, it has emerged.

Nick Mann, 35, was killed after being struck by a train on the Northern Line in the early hours of Sunday.

He reportedly descended onto the track after his brother, Robert Mann, 32 who is from Manchester, fell onto the line. Both were struck by the train and treated for their injuries at the station.

Robert is still at the Royal London Hospital, where is condition is described as stable but critical.

The pair had reportedly been out at Rooz Studios venue in East London, the Manchester Evening News reported.

It's understood Robert and Nick had been to a music night at the venue in East London, which is a short walk from the London Underground station.

Investigating officer detective sergeant Adrian Naylor said: "I am keen to speak to anyone who was at the station or on the platform when the incident happened to help us understand how the two men came to be struck by a train. If you witnessed the incident please get in touch with us on the number below."

Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting reference TSUB/B3 of 30/03/15. Information can also be passed anonymously to independent charity Crimestoppers on 0800 555 111.