SOUTH KOREA said yesterday that new key elements of a US anti-missile system have been set up on its territory.

In a step likely to alarm China and Russia as well as North Korea, Seoul announced that two or three launchers, intercept missiles and a radar had been installed at a site on a golf course in the country’s south.

The government said the US was working with it to activate the system as quickly as possible to counter the nuclear and ballistic missile threat from the North.