Koreas in tit-for-tat fire

South Korean military officials said it appeared the North was conducting drills off the west coast of the divided peninsula, but that some of their shells had landed close to the maritime border.

The South responded with verbal warnings and tit-for-tat warning shots of its own. In the first incident the North fired three shots at around 1 pm, and the South returned three artillery rounds toward the same area about an hour later. At dusk, the North fired three more shots, at least one of which landed near the border triggering return fire from the South, a military official said.