The Channel Tunnel, which connects France and the U.K., was closed Saturday after smoke was detected, forcing the suspension of Eurostar train services between the two countries.
"We are sorry but we are unable to run any further trains today because Eurotunnel has been closed due to smoke detected in the north tunnel," Eurostar said in a statement on its website.
"If you were planning to travel today, we advise you to postpone your journey and not to come to the station. "
SERVICE UPDATE - Due to smoke detection in the Channel Tunnel, all services are currently suspended, more info to follow.
SERVICE UPDATE - All trains are returning to original stations as Tunnel closed until further notice following smoke detection.
SERVICE UPDATE - No further services will be running today, more info will be updated this evening on http://t.co/deI6LKR0uH.
Police in Kent, England, told the BBC that a truck had caught fire on the French side of the tunnel, with the blaze being handled by French authorities.
No one was injured in the fire, the BBC reported.
Huge lines were reported at London's Kings Cross St. Pancras station, with passengers forced to make alternative travel plans.
Huge lines growing at London St Pancras after Eurostar fire cancels all trains @RuptlyNewsroom #eurostar
The wait to exchange/refund #Eurostar tickets. Just told it could be over 3 hour wait here at St Pancras.