A 900 kilogram Vietnam War-era bomb shell was discovered near a stream in the central province of Thua Thien-Hue on Tuesday, the VnExpress newswire reported.
Soil erosion caused by heavy rains exposed the bomb, which was surrounded by other small sized bombs and mines underground, next to the Ta Rinh Stream in A Luoi District.
Local authorities reported the find to the provincial Military Command and local sappers have arrived at the scene.
The sappers have erected a warning sign at the stream while waiting for the water levels to come down so that they can defuse all the bombs and mines.
They said the bombs, which were dropped by American forces during the war, were unexploded ordinances buried deep in the ground.