UP to 20,000 people have been forced to evacuate a historic European city after three unexploded WWII bombs were discovered.
Large parts of Cologne's city centre, including hospitals, care homes and a hotel, were all cordoned off as experts defused the explosives.
Several schools, kindergartens, museums and even the local tram network were shut down on Tuesday.
The bombs were all US-manufactured weapons from over 80 years ago.
Two were 90kg bombs with the third being a smaller 45 kg weapon.
It marked the largest evacuation of residents since WW2.
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