There has been an 'explosion' on the tracks at East Croydon station after a fire at 10.30am this morning.
British Transport Police (BTP) were called by Network Rail at 10.35am today. A BTP spokesman said that there was a small fire on the train line which was put out by Network Rail staff.
Passengers at the station said they had heard a loud bang coming from the direction of the fire.
A spokesman for Network Rail: "There was a problem with the conductor rail at the south end of East Croydon station which caused a small fire. The fire damaged the insulation round a set of points."
Sam May, 25, who works in the 50 pence building overlooking the tracks said he and his colleagues had heard the explosion from their work.
He said: "It was really loud but it was such a weird noise. Then I went down to look again and there was a second one just as I was approaching it. It was crazy."
Workmen at the site have not yet worked out what caused the small explosion. There will be a reduced service, with some cancellations, at East Croydon today, with only four tracks out of six working.
BTP went to the scene for public safety. London Fire Brigade were also called but did not go to the scene because of the size of the fire.
Mr May managed to film the end of the explosion. Watch it below:-