Seoul, May 25 (IANS): The Office of South Korean President Yoon Suk-yeol has condemned North Korea's ballistic missile launches as a grave provocation on Wednesday as Yoon ordered measures to ensure the US "extended deterrence" commitment to South Korea.

The Presidential office released the statement shortly after Yoon presided over a National Security Council meeting to discuss North Korea's launch of three ballistic missiles, including a presumed intercontinental ballistic missile, earlier on Wednesday, Yonhap news agency reported.

"The participants defined North Korea's missile launch as a grave provocation that violates UN Security Council resolutions, raises tensions on the Korean Peninsula and in Northeast Asia and threatens international peace, and strongly condemned this," it said in the statement.

"President Yoon ordered the thorough implementation of international sanctions against North Korea, including UN Security Council resolutions," it added.

The launches came only days after Yoon and US President Joe Biden held a summit in Seoul.

"In particular, President Yoon ordered that the readiness posture be maintained at all times to ensure no gap in the security of the Republic of Korea, and the implementation of practical measures for the activation of extended deterrence and strengthening of the South Korea-US combined defence posture, as agreed upon by the leaders of South Korea and the US," the office said.