North Korea 'tests another missile'

North Korea has fired another short-range missile off its east coast, the sixth such launch since it tested a nuclear weapon on Monday, South Korea's Yonhap news agency has reported.Friday's reported test-fire followed a statement from North Korea's foreign ministry pledging to respond if the UN Security Council agreed any fresh sanctions over the tests."If the UN Security Council provokes us, our additional self-defence measures will be inevitable," the foreign ministry said in a statement."Any hostile acts by the UN Security Council will be tantamount to the demolition of the armistice," it said in a reference to the truce that ended the Korean War in 1953.The North has previously test-fired short-range missiles into the Yellow Sea and the Sea of Japan, often during periods of tension in the region.North Korea conducted its second nuclear test on Monday and followed it up with a series of short-range missile launches, all in violation of a UN resolution.