South Korea launched an anti-submarine drill off its west coast Thursday as part of its military responses to Pyongyang's sinking of a Seoul warship in March, while North Korea's military immediately hit back with a threat to scrap inter-Korean accords to prevent accidental naval clashes, Yonhap reported.
The North's latest threat ratcheted up already high tensions on the Korean Peninsula in the wake of a multinational investigation last week that blamed Pyongyang for torpedoing the Cheonan patrol ship in the Yellow Sea border on March 26, killing 46 South Korean sailors.