South Korea has begun a series of major live-fire exercises despite warnings from the North against conducting them, BBC said. The drills are spread off South Korea’s east, west and south coasts; the most contentious area – the disputed western sea border – has been largely excluded. It comes two weeks after North Korea shelled a Southern island in response to previous military exercises there, killing four South Koreans. President Barack Obama has urged China to work with the US to send “a clear message” to North Korea that its provocations against South Korea are “unacceptable”. The US was to host talks on Monday with Japan and South Korea on ways to deal with the North.