North Korea said on Monday it had successfully test-fired a new type of medium- to long-range ballistic missile a day earlier, claiming further advancement in a weapons program it is pursuing in violation of United Nations resolutions.

North Korea fired the ballistic missile on a high arc into the sea early on Sunday, the first test of U.S. President Donald Trump’s vow to get tough on an isolated regime that tested nuclear devices and ballistic missiles last year at an unprecedented rate.

The North’s state-run KCNA news agency said leader Kim Jong Un supervised the test of the Pukguksong-2, a new type of strategic weapon capable of carrying a nuclear warhead.

The United States, Japan and South Korea requested urgent U.N. Security Council consultations on the test, with a meeting expected on Monday afternoon, an official in the U.S. mission to the United Nations said.