About 2,600 Nagoya residents were evacuated Sunday morning while a Ground Self-Defense Force unit disposed of an unexploded bomb apparently dropped by the U.S. military during World War II.

The bomb squad defused the 1-ton bomb, which was about 180 cm long and roughly 60 cm in diameter, GSDF officials said. It contained about 500 kg of explosives.

The bomb was found March 12 at a site where a factory had stood, and was about 2 meters below the ground near the pier at Nagoya port in Minato Ward.

About 2,600 residents from about 1,200 households evacuated in the morning to places such as a local soccer field as an area with a radius of 500 meters from the site was kept off-limits.