SEOUL, May 21 (Reuters) - South Korea's President Lee Myung-bak said on Friday the government would be very prudent in its responses to North Korea in the wake of findings that the communist neighbour sank one of its naval ships.
"Since this case is very serious and has a grave importance, we cannot afford to have a slightest mistake and will be very pr7dent in all response measures we take," Lee said, according to a statement of his comments made before an emergency National Security Council meeting.
