North Korea's been hit by extra sanctions as punishment for its recent missile tests.
United Nations Security Council has agreed to ban certain exports - including metals, coal, and other raw materials - valued at an estimated 800-million euro.
Matthew Rycroft, who's the UK Ambassador to the UN, says the risk to other countries is unacceptable.
Robert Kelly is a professor of political science in South Korea - he says the measures will really hit the regime in Pyongyang.
