Kim Jong Un made stern assessment saying that it was a serious accident and criminal act caused by absolute carelessness, irresponsibility and unscientific empiricism which is out of the bounds of possibility and could not be tolerated,

North Korean ruler Kim Jong Un said a new naval destroyer was damaged in a "serious accident and criminal act caused by absolute carelessness."

North Korea began a full-scale investigation into an accident that damaged a new warship at its launch ceremony this week, state-run media reported Friday, with investigators vowing to punish those responsible.