Updated

Transport officials in London will be paying compensation to hundreds of people stranded on a subway line that is critical to the upcoming London Olympics.

Some 770 people had to get off their trains and walk through the tunnels Wednesday evening because of troubles on the Jubilee Line. The line is a critical artery for the Olympics, which start July 27 and end Aug. 12.

Officials said Thursday that passengers affected by the chaos caused by a stranded train will receive 40 pounds ($62) in compensation.

Underground officials apologized, but the problems only underlined concerns about transportation in London. One big question is whether London's vast and aging transport system will be able to cope with the massive influx of tourists and spectators coming to the Olympics.