London, Nov.10 Navies of North and South Korea have exchanged fire in waters off the west coast of the two countries, Sky News reports.

A South Korean warship shot at a navy vessel from the North that crossed the disputed border in the Yellow Sea, a South Korean military officer said.

The North's ship then shot back, he said.

Another officer said there were no South Korean casualties, although it was unclear whether there were any on the North Korean side.

The North Korean ship was seriously damaged and turned back toward northern waters after the brief skirmish, he added. (ANI)