Korea's ruling Saenuri Party said Thursday that the alliance between Seoul and Washington is vital to stop Pyongyang's missile provocations, adding that the opposition parties should also support the deployment of an advanced U.S. missile defense system here.

"Those protesting the most against the deployment of Terminal High Altitude Area Defense is North Korea's Kim Jong-un regime," Chung Jin-suk, the party whip said. "That proves the deployment is essential for South Korea."

Earlier this month, Korea and the United States decided to deploy the defense system in the country amid the continuing nuclear and missile provocations from Pyongyang.

The move, however, has been opposed by the opposition blocs, which claim that it will make neighboring Beijing and Moscow uncomfortable.