North Korea's Ambassador to the UN Han Tae Song warned the US will suffer the "greatest pain it ever experienced" after the UN approved new sanctions.
Speaking at a conference Mr Tae Song said: "The forthcoming measures by DPRK will make the US suffer the greatest pain it's ever experienced in its history.
"The Washington regime finally opted for political, economic and military confrontation, obsessed with the wild dream of reversing the DPRK's development of nuclear force which has already reached the completion phase.
REUTERS/GETTYMr Tae Song said North Korea is ready to use any 'form of ultimate means' against the US
"The DPRK is ready to use any form of ultimate means."
The UN passed new sanctions