North, South Korea Naval Ships Exchange Fire: Reports

North Korean and South Korean naval vessels briefly exchanged fire Tuesday in the two sides' latest military confrontation, reports said. The clash occurred after the North Korean patrol boat crossed the disputed sea border, with no casualties reported on the South Korean side, Reuters said, citing a South Korean defense official. The exchange took place at about 9:50 a.m. local time (8:50 p.m. U.S. Eastern time), and the Northern ship shot first, Agence France-Presse said, citing a South Korea Defense Ministry spokesman. South Korea's won weakened slightly after the news, with the dollar rising to about 1066 won from just below 1064 when the reports broke.