The China Aerospace Science and Industry Corporation is to test-fire the new Dong Feng 21D anti-ship ballistic missile, China National Radio has said.

The Dong Feng 21D has a range of 1,300-1,800km and can carry six warheads.

The missile, described as an aircraft carrier killer, is capable of sinking a ship immediately as it passes through the outer hull and explodes inside.

China had previously neither confirmed nor denied reports that it has finished developing the missile and would test-fire it this year.