North Korea is accusing the US and its nuclear negotiating partners of being too slow to award fuel oil and political benefits promised in a disarmament deal.

The North Korean Foreign Ministry said it had disabled 80 per cent of its main nuclear complex, but countries involved in six nation disarmament talks had only shipped 40 per cent of energy shipments promised to the North.

The energy-starved North was promised the aid equivalent of one million tonnes of heavy fuel oil under the February 2007 deal with China, South Korea , Russia, Japan and the United States.

The ministry statement said North Korea has shown its resolve to disarm by destroying a cooling tower at its Yongbyon nuclear complex - a measure it says was required under the denuclearisation agreement.

North Korea submitted a long awaited declaration of nuclear facilities to China last week, raising hopes for a breakthrough in stalled talks on its atomic programs.

In exchange, Washington lifted some economic sanctions against the North and began steps to remove the country from a US State Department list of states that sponsor terrorism.

North Korea 's statement said, however, that the US has not yet removed it from the terrorism list and that it will only move on to the next phase of the denuclearisation process when it has been awarded all the energy aid and political benefits promised under the deal.