|Authorities brought in armed vehicles to assist in the evacuation|
Residents were ordered to leave after the device was found during construction work in a wealthy suburb of the city.
Around 60,000 residents were ordered to leave their homes
Police used a helicopter with heat-sensing cameras to ensure the evacuation zone, which covers a radius of around one mile, was completely clear.
|Around 60,000 residents were ordered to leave their homes|
City streets fell silent as the authorities cleared the evacuation zone
The fire service helped around 500 elderly people to leave their care homes. Emergency crews had earlier evacuated babies and intensive care patients from two hospitals.
The evacuation area also includes Germany's central bank, where the country's gold reserves worth in the region of €59bn (£54bn) are stored.
Displaced Frankfurt residents found shelter at a collection centre
|City streets fell silent as the authorities cleared the evacuation zone|
Some of the city's museums have offered free entry to displaced residents.
The bomb was discovered on a construction site in a Frankfurt suburb
Bomb disposal experts will use a special system to try to unscrew the bomb's fuse from a safe distance. If that fails they will try to cut the fuses away with a water jet.
Every year in Germany more than 2,000 tonnes of munitions and live bombs are discovered, some underneath existing buildings.
They were dropped by the RAF and US Air Force during the war.