The South Korean military said the accident near the North Korean border occurred during training ahead of Freedom Shield, an annual U.S.-South Korea joint military exercise.

The number of houses damaged in last week's accidental bombing of a South Korean northern village has grown from 58 to 142 following a second survey, the local government said on Sunday.

Two South Korean fighter jets accidentally dropped eight bombs on a civilian area during training, injuring at least eight people, officials said.