North, South Korea trade artillery rounds into the sea - Seoul

SEOUL (Reuters) - North Korea fired more than 100 artillery rounds into South Korean waters as part of a drill on Monday, prompting the South to fire back, officials in Seoul said, but the exercise appeared to be more sabre-rattling from Pyongyang rather than the start of a military standoff.

The North had flagged its intentions to conduct the exercise in response to U.N. condemnation of last week's missile launches by Pyongyang and against what it says are threatening military drills in the South by U.S. forces.