Eurostar trains to London and all trains heading to northern France were brought to a halt Friday following the discovery of an unexploded World War II era bomb on tracks leading to the nation’s busiest station.

London to Paris trains resume as WW2 bomb discovery prompts evacuations - Disruption leaves crowds of passengers stranded at London’s St Pancras International and Gare du Nord in Paris

All 32 trains scheduled to run between London and Paris on Friday have been cancelled, wrecking travel plans for thousands of passengers. But extra services have been added to Saturday's timetable.