Authorities in Cologne said this was the largest evacuation of the city since World War II. Unexploded ordnance has commonly been found across Europe.

Over 20,000 people are being evacuated in Cologne on 5 June as authorities defuse three unexploded US bombs from World War II. The evacuation zone includes the city’s old town, train station, and hospitals.

The German city of Cologne is moving 20,500 people in its largest evacuation since World War II, after officials discovered three massive, unexploded bombs.