The explosion happened after drilling during construction work near Donnersbergerbruecke station caused the bomb to go off, police said. By Wednesday afternoon, emergency services had left the scene and trains had resumed running.
The explosion was caused by an old aircraft bomb, Munich police press officer Carolin Schrott told CNN.
“There is no danger outside the immediate area,” police said.
No further information was available on the type of bomb involved but munitions dating back to World War II are not uncommon finds in Germany. More than 70 years after the end of the war, roughly 2,000 tons of live bombs and munitions are still discovered in the country each year, Reuters reported.
According to official estimates, some 15% of the World War II bombs did not explode, and in some cases are buried six meters (20 feet) below ground.
Police defused an unexploded World War II bomb weighing 1,100 pounds (500 kg) in Berlin in April 2018, and in September 2019 almost 60,000 people were evacuated in Frankfurt after a 3,000-pound bomb was found.