China has said military construction on the islands it controls in the South China Sea will be limited to necessary defensive requirements, and that it can do what it likes on its own territory.
The United States has criticised what it has called China's militarisation of its maritime outposts and stressed the need for freedom of navigation by conducting periodic air and naval patrols near them that have angered Beijing.
The state-run Defence Times newspaper, in a Tuesday report on its WeChat account, said Norinco CS/AR-1 55mm anti-frogman rocket launcher defence systems with the capability to discover, identify and attack enemy combat divers had been installed on Fiery Cross Reef in the Spratly Islands.
Fiery Cross Reef is administered by China but also claimed by the Philippines, Vietnam and Taiwan.
The report did not say when the defence system was installed, but said it was part of a response that began in May 2014, when Vietnamese divers installed large numbers of fishing nets in the Paracel Islands.
More than $5 trillion of world trade is shipped through the South China Sea every year. Besides China's territorial claims in the area, Vietnam, Malaysia, Brunei, the Philippines and Taiwan have rival claims.
(Reporting by Philip Wen; Editing by Ben Blanchard)
(This story has not been edited by NDTV staff and is auto-generated from a syndicated feed.)
Get Breaking news, live coverage, and Latest News from India and around the world on NDTV.com. Catch all the Live TV action on NDTV 24x7 and NDTV India. Like us on Facebook or follow us on Twitter and Instagram for latest news and live news updates.