BERLIN (AP) — More than 70 years after the end of the war, authorities are still finding unexploded bombs in Germany.

Police in central Germany said that a 13-foot deep, 33-foot wide crater has appeared in a field in central Germany, apparently caused by a World War II bomb exploding in the middle of the night.

Police said Monday that the crater was discovered on Sunday afternoon near Limburg and there was no indication it was caused by farm machinery or other tools. Residents reported having heard a loud explosion and felt a blast in the early hours of Sunday.

No one was hurt. News agency dpa reported that police said the shape of the crater, among other factors, led explosives clearance experts to confirm it was created by a bomb.

The VIII Bomber Command, later known as the Eighth Air Force, was sent to England in February 1942 weeks after the Japanese bombed Pearl Harbor in December 1941. The so-called “Mighty Eighth” completed a strategic bombing campaign against Nazi targets in France and Germany during WWII and secured 11,200 aerial victories.