The United Nations Security Council members were in emergency talks on Wednesday to consider their response to North Korea test-firing at least seven missiles.
The closed-door meeting was requested by Tokyo after Pyongyang test-fired seven missiles on Wednesday, including a long-range Taepodong-2 capable of reaching US soil, sparking fierce condemnation from neighbouring Japan and the United States.
Diplomats said they do not expect any resolution to be voted today and were not sure whether the 15-member Council will issue a consensus statement, a step lower than resolution.
"We're going to meet this morning to discuss the situation, go over some of the procedural issues. Then the government of Japan will have a draft resolution to begin consideration at the expert level later this afternoon," he added. "This is obviously a very serious matter."
Tokyo has flayed the North Korean launches and threatened "stern measures," including possible economic sanctions against Pyongyang.
Meanwhile, Chinese Ambassador Wang Guangya, whose country is a close ally of Pyongyang, said Beijing was concerned about the North Korean launches but stressed that any action "should be constructive."
The United States, meanwhile, announced it would dispatch its top envoy on Asian affairs, Assistant Secretary of State Christopher Hill, to the region for talks, while South Korea's national security adviser was due at the White House.