Trespasser causes London Euston delays
Commuters are facing delays after all trains were cancelled at Euston due to a trespasser on the tracks.
Police attended the London station after reports of a person climbing on a train.
National Rail said all lines had since reopened but disruption could continue for the rest of the day. It said it was sorry for the delays.
Virgin Trains, West Midlands Trains and London Overground services operate at Euston.
A BBC journalist travelling from Euston said their train manager announced the delays were "caused by a man who ran on to the track at Euston, climbed up a bridge and then jumped on to the top of a train".
The train manager said the man had suffered an electric shock and was in hospital, they added.
National Rail said: "Power will be returned to overhead lines shortly as police have resolved the previous incident with the trespasser.
"Train services are now likely to be subject to short notice cancellation, alteration or changes."
Virgin Trains said at 21:45 GMT that it was running a full service with some delays.
A spokeswoman added: "We will be running a full service tomorrow."
Commuters took to twitter to complain of the crowds and delays at the station.