UNITED NATIONS (AFP) - The UN Security Council held emergency talks Sunday on the escalating showdown between the two Koreas as South Korea vowed to go ahead with a live-fire military exercise on a frontier island. US envoy Bill Richardson meanwhile put his own proposals to North Koreas military leadership in Pyongyang in a bid to ease the increasing hostility between the two sides. Its a very, very tense situation, a crisis situation, Richardson told CNN from Pyongyang. Russia, which demanded the special Security Council meeting, wants UN Secretary General Ban Ki-moon to send a special envoy to both states to seek urgent measures to halt the latest crisis, diplomats said. It made the call in a draft statement sent to the councils other 14 members, diplomats said. The draft statement called for maximum restraint by North and South Korea. The Security Council negotiations looked set to become protracted as the Security Council has not yet managed to even release a statement on the Norths shelling of Yeonpyeong on November 23 which set tensions spiralling. China has blocked any condemnation of the North. We are seriously concerned about possible further escalation of tension on the Korean peninsula, Russias UN envoy Vitaly Churkin said Saturday. We believe that the Security Council must send a restraining signal to South and North Korea, he added. The foreign ministers of China and Russia held telephone talks Saturday and urged South Korea to cancel its military exercise. China firmly opposes any actions to cause tension and worsen the situation, and demands both sides on the peninsula show calmness and restraint, Chinese Foreign Minister Yang Jiechi said. In Pyongyang, Richardson, governor of New Mexico and a veteran negotiator with the communist North, proposed that the two Koreas set up a military hotline to address border incidents, CNN reported. He also lobbied for a military commission with members from North and South Korea plus the United States to monitor disputed areas in the Yellow Sea, which includes Yeonpyeong. Richardson, an allys of President Barack Obama, spoke after meeting Major General Pak Rim Su, who leads North Korean forces on the tense border with the South. He described their talks as very tough but making some progress. Richardson said Pyongyang was very, very provoked by the Souths planned drill, although the North Korean general was open to his idea for a military commission. Pyongyang has threatened disaster if the South stages the drill on Yeonpyeong, and a foreign ministry statement Saturday accused US troops of providing a human shield. The North said the exercise would make it impossible to prevent the situation on the Korean peninsula from exploding and escape its ensuing disaster. South Korea has rejected calls for the drill to be abandoned, and said the one-day exercise may take place on Monday or Tuesday. The Norths attack in November, the first shelling of civilian areas since the 1950-53 Korean War, sparked outrage in the South, which rushed more troops and guns to frontline islands. South Korea had been on a heightened alert since the sinking of a South Korean warship in March with the loss of 46 crew, which it blamed on the North. Military tensions have taken off in parallel to new international fears over the Norths nuclear arms. It has revealed a uranium enrichment programme, and after