US-Korean defence system up and running

The controversial US missile defence system in South Korea is up and running, according to military sources.

The US military's THAAD missile defence system in South Korea has reached an initial operating capability to defend against North Korean missiles, US officials say, forging ahead with the system despite staunch objections from China.

Beijing has opposed activating the Terminal High Altitude Area Defense (THAAD), arguing the system's radar could be used to spy into its territory.

Local residents have worried they will be a target for North Korean missiles.