URGENT ¥¥¥ N. Korea threatens 'stronger' action after nuke test

North Korea warned Tuesday that its nuclear test was only a "first" step and warned of stronger action if it was faced with tougher sanctions.

"The latest nuclear test was only the first action, with which we exercised as much self-restraint as possible," the foreign ministry said in a statement carried by the country's official news agency.

"If the US further complicates the situation with continued hostility, we will be left with no choice but to take even stronger second or third rounds of action," it said without elaborating.