BRUSSELS — Eurostar services between London and mainland Europe resumed on Wednesday after a major disruption in the Channel Tunnel left thousands of passengers stranded a day earlier.

The high-speed rail operator had canceled most of its London-bound and outbound services on Tuesday after an overhead power supply fault inside the tunnel was compounded by a failed Le Shuttle train, which transports passengers and vehicles through the crossing.

The incident blocked all routes through the tunnel, causing hours-long delays and widespread cancellations. Some trains in Europe that do not use the Channel crossing, such as the Paris-Brussels route, were also suspended due to the overall delays.

A Eurostar spokesperson told POLITICO that services were to resume at 7 p.m. Brussels time (6 p.m. London time) on Tuesday evening, after a “partial reopening of the Channel Tunnel.” Getlink, the company that operates the Channel Tunnel, said work continued through the night to fix the power issue, allowing rail traffic in both directions to restart early Wednesday, BBC reported.

Eurostar apologized to passengers for the disruption and warned of possible knock-on delays and last-minute cancellations on Wednesday as services return to normal. Travelers were urged to check their journeys before heading to stations.

On Tuesday, Eurostar “strongly” advised passengers to postpone travel where possible and not to head to the train station if their train had been canceled.