S Korea mourns sailors amid N Korea tensions

South Korea has marked the third anniversary of the sinking of the Cheonan warship, which left 46 sailors dead.

Officials used a memorial service to urge North Korea to abandon nuclear weapons, after it was announced artillery and rocket units had been ordered into "combat posture" to target South Korean and US military bases.

Relatives also attended the service for the Cheonan victims, which sank in 2010 near the disputed inter-Korean western maritime border.

South Korea says a North Korean torpedo sank the ship but Pyongyang denies any involvement.