Rail traffic at the Gare du Nord in Paris, a station that receives Eurostar trains from London as well as high-speed and local services, has been halted after a second world war bomb was found on nearby tracks, writes The Guardian.

The unexploded bomb weighing 500kg was found in the middle of a set of tracks during overnight maintenance work in the suburb of St-Denis, about 2.5km from the Gare du Nord. Minesweepers were quickly sent to the site.

Bombs from the first and second world war are regularly discovered around France. The device was found 2 metres below the ground in a location known for potential second world war debris. The rail maintenance work had been carried out with special precautions. When the device was found, work stopped and minesweepers were called in, with the perimeter extended to 1km on Friday morning. No one had to be evacuated from their home.

All rail traffic to the Gare du Nord, France’s busiest railway terminal, was stopped as Paris police worked to disable the device.

The Gare du Nord is a major European transit hub, serving international destinations such as Belgium and the Netherlands, as well as the main Paris airport and many regional destinations. The station, in the north of the French capital, serves an estimated 700,000 people each day, according to the SNCF national rail company. The French transport minister, Philippe Tabarot, told French radio before heading to the scene that teams were “massively mobilised” to deal with the device. He said: “There’s nothing to be afraid of, but there are procedures we have to respect”.

Tabarot said the teams were working as fast as possible within a large security perimeter, adding that disruption was likely throughout the day but he hoped some trains could resume in the afternoon.