North Korea has fired several anti-ship cruise missiles off its east coast, South Korea's military says, BBC reports.
Authorities said the weapons, launched on Thursday morning near the city of Wonsan, appeared to be short-range "surface-to-ship" missiles.
They flew about 200km (125 miles) before landing in the water.
Repeated ballistic missile tests by the North this year - not all successful but all a breach of UN sanctions - have sparked international alarm.
Experts fear the tests indicate progress towards Pyongyang's ultimate goal of putting a nuclear warhead on a missile.
It is unclear whether the latest firing violates the UN Security Council's resolutions against North Korea.