"China will not stand idly by and will be forced to take countermeasures should the US deploy intermediate-range ground-based missiles in this part of the world," said Fu Cong, the director of arms control at the Chinese foreign ministry.

"And we also call on our neighbours, our neighbouring countries, to exercise prudence and not to allow a US deployment of its intermediate-range missiles on (their) territory," he added, naming Australia, Japan and South Korea.