South Korea fires missiles in drills amid stand-off with North

They involved 15 warships including a 3,200-ton-class destroyer, as well as helicopters and fighter jets, South Korea's navy said in a statement.

South Korean jets and navy ships have fired a barrage of guided missiles into the ocean during drills in a display of military power two days after North Korea test-launched its first intercontinental ballistic missile.

The North's ICBM launch, its most successful missile test to date, has stoked security concerns in Washington, Seoul and Tokyo as it showed the country could eventually perfect a reliable nuclear missile capable of reaching anywhere in the United States.