US Secretary of State Hillary Clinton says the international community must respond in the growing crisis over the sinking of a South Korean warship.

She said there was “overwhelming” evidence that North Korea was to blame, and urged Pyongyang to halt its “policy of belligerence”.

Mrs Clinton was speaking in South Korea at the end of an Asian tour.

North Korea denies it was responsible, and has warned of retaliation if action is taken against it.