South Korean officials say what appears to be a ballistic missile has been launched off its eastern coast

South Korean officials say North Korea test-fired what appears to be a submarine-launched ballistic missile off its eastern coast.

An official at Seouls defence ministry on Saturday couldnt immediately confirm how far the projectile travelled and where it landed.

North Korean efforts to develop submarine-launched missile systems are a serious concern for rivals and neighbours because missiles from submerged vessels are harder to detect in advance.

The launch came a day after US and South Korean military officials said they were ready to deploy an advanced US missile defence system in South Korea to cope with North Korean threats.

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North Korea reportedly test-fires submarine-launched missile
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