Thousands of residents in Frankfurt, Germany have evacuated their homes ahead of the scheduled defusal of a major World War II bomb.
If the bomb isn't defused, it could cause an explosion big enough to flatten a city block... a threat severe enough to cause the largest post-war evacuation in Germany's history.
In Koblenz, about 21,000 were displaced from homes, a prison, and a hospital as specialists defused a 1,100-pound USA bomb Saturday.More news: Cambodia arrests opposition leader for 'treason'
Police used a helicopter with heat-sensing cameras to ensure the evacuation zone, which covers a radius of around one mile, was completely clear.
The fire service helped around 500 elderly people to leave their care homes.
The device - believed to have been dropped by British forces during raids more than 70 years ago - was discovered during construction works in a wealthy part of the city, with Germany's central bank included in the evacuation area.More news: Angels get slugging OF Justin Upton in deal with Tigers
Authorities in Frankfurt, Germany's financial hub, said over 100 patients, including two premature babies and people in intensive care, were evacuated from hospitals.
Those affected have been offered free entry to several of the city's museums, while shelters have also been opened for residents. If that fails they will try to cut the fuses away with a water jet.
Unexploded bombs are regularly found in German cities. About half the 2.7 million tonnes of bombs dropped by Allied powers during World War Two landed on German soil.More news: Canadian GDP sees strongest half-year growth in 15 years: StatsCan