A half-ton World War II-era bomb found by workers near train tracks outside of Paris is disrupting train and road travel across the region.

A French government official said Friday that train services will gradually resume and roads will reopen after the disposal operation of an unexploded World War II bomb caused transportation chaos in Paris on Friday,

Train services from Paris will gradually resume later Friday after the disposal operation of an unexploded World War II bomb caused transportation chaos in the French capital, including the suspension of high-speed train links with London and Brussels.

An unexploded WWII bomb discovered near tracks leading to France's busiest train station has severely disrupted rail service as police work to disable the device.

The cascade of transportation woes hit morning rush-hour train services before spreading to the road network, with Paris police closing the A1 highway that feeds into the north of the city, as well as sections of the capital’s always-busy ring road.

Commuter traffic at one of France's busiest train stations came to a complete halt Friday morning after workers discovered an unexploded World War II bomb under the tracks north of Paris' Gare du Nord.

Gare du Nord, located in the north of Paris, is the busiest rail station in France, serving approximately 700,000 passengers daily

Police have blocked rail services to and from Gare du Nord after an unexploded device was found on the tracks in the Saint-Denis district.

Speaking to the BBC before the French transport minister confirmed the WW2 bomb had been defused, Lejeune says they thought it was the "better option" to cancel all 32 services between London and Paris today because it would give passengers "clarity" amid the "uncertainty".

Police outside of Paris evacuate people Friday after an unexploded World War II-era bomb was found in the Seine-Saint-Denis area north of the city. (Credit: Reuters)