The UN Security Council has condemned the attack on a South Korean warship in March.
All 15 members said the attack “endangers peace and security in the region and beyond.”
But they stopped short of blaming North Korea in a concession to China, which enjoys closer diplomatic ties with Pyongyang.
The North Koreans deny any involvement in the torpedoing of the naval corvette and have severed all ties with Seoul.
The country’s reclusive leader Kim Jong-Il has been driving the country’s nuclear ambitions since taking over from his father more than a decade ago.
Two nuclear tests have left the secretive state increasingly isolated.