Armed police have arrested a man on the tracks of a busy London station who was claiming he had a bomb.

Witnesses described several police vehicles descending upon Charing Cross, through which both overground and underground trains run, where passengers were told to "move away" as the station was evacuated during the morning rush hour.

The British Transport Police (BTP) said they were called at 6.35am to deal with an incident "following reports of a man on the tracks claiming to have a bomb".

Officers detained the 38-year-old man at around 7.45am, and he has been held under the Mental Health Act. He was searched by specialist officers and no bomb or weapon was found, BTP said.

A picture showing a man being arrested was shared on social media. The topless supposed suspect can be seen near the back of a police van with his hands in handcuffs behind his back with a bag of clothes at his side.