The US and China are working on a “range of options” on North Korea, the US top security adviser has said, as tensions mount over the country’s nuclear and missile programmes.
Lt Gen HR McMaster told ABC News there was consensus that this was a “situation that just can’t continue”.
The comments come after a failed missile test launch by North Korea, and a massive military parade.
President Trump had earlier said China was “working with us” on the issue.
Beijing, Pyongyang’s biggest ally, has not made public comments about any co-operation with Washington on how to deal with the North Korean threat.
Gen McMaster, who was in the Afghan capital, Kabul, said the US would respond “in the best interest of the American people”.
“The president has made clear that he will not accept the United States and its allies and partners in the region being under threat from this hostile regime with nuclear weapons,” he said.