Severe delays have hit several London Undeground lines this evening after a person was spotted on the track earlier today.
Delays struck the Circle, Hammersmith and City, Jubilee and Metropolitan lines, Transport for London has said.
Read more: Travel chaos strikes at Euston station
Authorities said a trespasser had been on the tracks.
Delays were also worsened on the Jubilee line after engineers found problems with one of the trains.
Meanwhile travellers have been advised to avoid St John’s Wood between 7pm and 8.30pm as Middlesex plays Surrey at Lord’s Cricket Ground.
Transport for London briefly closed off the nearby Baker Street station to commuters trying to get in. Travellers were still let off at the site.
It comes as a signal failure sparked chaos at Euston, shutting down all trains out of the station.
The glitch has been sorted, but delays are still expected.