The defection of the four North Koreans could spark tensions on the peninsula , where joint U.S.-South Korea military drills have kicked off this week . A boat with a crew of five sails into South Korean waters , the Red Cross says . Four of the crew decide to stay in the South . The number of deaths has risen dramatically in the past year .
A boat with a crew of five sails into South Korean waters , the Red Cross says . Four of the crew decide to stay in the South . The number of deaths has risen dramatically in the past year .