Sappers unearthed an unexploded 450-kilogram bomb leftover from the Vietnam War in the central province of Ha Tinh on Saturday, the online newspaper VnExpress reported.
The sappers found the bomb while searching for unexploded ordinances (UXOs) in a cornfield in a rural village of Huong Son District.
They found the bomb with its fuse intact only one meter below ground in a vertical position, they said.
It was then removed from the cornfield in order to be defused.
According to government statistics, around 800,000 tons of UXOs were left behind after the Vietnam War ended in 1975.
Between 1975 and 2000, UXOs killed more than 40,000 people in Vietnam, injuring 60,000 others. The nation spends about US$100 million per year clearing UXOs.