Trains travelling through Twickenham station have been delayed for up to 45 minutes because of a fire on the tracks.
National Rail said trains on the Hounslow loop had been suspended.
Trains from Reading and Windsor to London Waterloo will run through Hounslow.
Passengers can use their tickets on London buses and the tube, the operator said.
Trains through Kingston are also affected.
Did you see what happened? Call the newsdesk on 020 8744 4273.
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