South Korea today held a live-fire military exercise on the island North Korea shelled last month.

The North attack on Yeonpyeong island killed four people and sparked a wave of international condemnation.

The North had previously threatened an "unpredictable self-defensive blow" if the drill exercise went ahead, but there has been no military response so far.

The South has come under criticism from Russia and China for its actions, who urged it stop the drill. The US has supported the South's actions, saying that the state is entitled to be "properly prepared in the face of... ongoing provocations".