Clapham Common: passengers smash windows to escape tube train amid fire alert

London fire brigade suggest smoke probably caused by train's brakes and police say nobody hurt in incident

Passengers climbed out of the smashed windows of a tube train at Clapham Common station in London on Friday evening amid a fire alert.

A video posted on social media shows a man with a hammer cracking one of the Northern Line tube windows to allow travellers trapped inside to get out, while other videos show smashed windows.