British Transport Police (BTP) is appealing for witnesses after a man narrowly missed being hit by two trains at Barking station.
Investigators have released CCTV images of a man they would like to speak to in connection with the incident, which took place at Barking station on Saturday, 7 September.
PC Phil Church, the investigating officer, told Aol Travel: "The man was approaching the station concourse when he noticed a number of uniformed police officers.
"Upon seeing this, the man ran down the stairs, jumped on the tracks and crossed to platform four.
"Here he ran along to platform three before he again trespassed on the tracks, narrowly missing being hit by a District Line Tube train, as he headed towards platform one.
"He again ran onto the tracks as a London Overground train was approaching, forcing the driver to apply the emergency brakes, before running from the station."
Officers are carrying out a number of enquiries including viewing CCTV and speaking to witnesses to the incidents.
PC Church added: "Trespass on the railway is, in itself, extremely dangerous and irresponsible, but to run in front of moving trains is putting your life on the line.
"If you recognise the man, or have any further information about the incident, I'd urge you to come forward."
Call British Transport Police on 0800 40 50 40 or Crimestoppers, anonymously, on 0800 555 111, quoting log B7/LNA of 25/09/2013.
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