North Korea test-fired another short-range missile off its east coast on Friday and said it would take more "self-defense measures" if the U.N. Security Council punished it for this week's nuclear test. Yonhap quoted an unnamed government source as saying the North fired the short-range rocket from its Musudan-ri missile base around dusk, making it the fifth to be launched since the nuclear test. Most of the missiles are believed to have a range of around 130 km (80 miles). South Korea said an increasingly aggressive North may be preparing fresh moves after Chinese fishing boats were spotted leaving a disputed sea border on the west coast.