German authorities announced on Sunday that bomb experts safely defused a huge vintage bomb unearthed last month in Koblenz, a city located west of Germany, as the Rhine River dried up due to the extended dry period that had hit the country.

More than 100,000 thousand residents were ordered evacuated by city officials to ensure their safety as experts worked to defuse the 1.8 tonne bomb, which authorities said was probably dropped by the British during World War II.

A separate 257-pound bomb, identified by officials as originating this time from the air bombardment campaigns conducted by the United States, was also discovered near the first location.

According to the Associated Press, Koblenz residents were used to series of bomb scares as the area was heavily targeted by Allied air raids in the closing period of the last global conflict.

Apart from the city, unexploded bombs unleashed during the war were regularly stumbled upon in different locations across Germany by locals who were either tending on their farms or constructing new buildings, the AP report said.

In a statement, Koblenz's firefighting department said that thousands of residents were ordered out by Sunday morning as city officials cleared the way for bomb experts to safely defuse the bomb, projected to have caused serious damages and loss of lives had it exploded.

Fireman Heiko Breitbarth, speaking for his department, told reporters that an estimated 2500 police officers, firefighters and paramedics were deployed and mobilised to assist with the evacuation of residents, who were ferried by bus to shelters temporary erected by authorities.

By nightfall and as both bombs have been defused by a team bomb experts led by Horst Lenz, Koblenz officials declared the lifting of the evacuation order and cleared the return of the city residents, AP said.

Also, another bomb was discovered in Nuremberg though city officials had indicated that it was disposed off in about 15 minutes but not without the forced evacuation of some 200 residents living within the radius of the bomb's location.