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.

Eurostar trains between London and Paris have been cancelled after the discovery of an unexploded bomb dating back to the Second World War near the tracks.The unexploded bomb was reportedly found by workmen overnight in the Paris neighbourhood of Saint Denis.

Eurostar has cancelled all trains between London and Paris throughout Friday, after the discovery of an unexploded Second World War bomb disrupted traffic at Paris ’s busy Gare du Nord station. “An unexploded bomb from the Second World War was discovered near the tracks,” French national railway company TER said.