Park, in particular, underscored the need to strengthen the U.S.' extended deterrence, which involves the nuclear umbrella.

Extended deterrence means Washington's stated commitment to mobilize all military capabilities, nuclear and conventional, to defend its ally against Pyongyang's possible aggression and provocations.

"To allay our people's concerns, I instruct our military to maintain a full readiness posture to strongly retaliate against any type of North Korean provocation," Park said.

Park, in addition, called for an end to the political offensive against the planned deployment of a US anti-missile system to the Korean Peninsula, saying that the nation should take "basic" steps to defend itself against the possibility of a North Korean attack.

Seoul and Washington plan to deploy a Terminal High Altitude Area Defense (THAAD) battery to the peninsula by the end of the next year. But some opposition lawmakers have opposed the plan, saying it could escalate regional tensions and bring South Korea into an intensifying Sino-U.S. rivalry.

Meanwhile, Foreign Minister Yun Byung-se said that the government will explore ways to respond to the North's latest provocation with the reckless aspect of the North Korean regime in mind.

The meeting was attended by the ministers of defense, foreign affairs and unification, and senior presidential secretaries in charge of security and foreign policy. (Yonhap)