UK's Network Rail said London's Charing Cross station was closed early on Tuesday due to a gas leak in a nearby road.
Some services may be delayed or cancelled as a result, it said, adding that the station would be reopened as soon as it gets clearance from emergency services.
Transport for London also tweeted, informing commuters that "A4 Strand / Northumberland St - Rd is closed" between Trafalgar Square and Bedford Street.