North Korea's vice foreign minister: "The U.S. had better not put our patience to the test any longer with such remarks irritating us if it doesn't want to have bitter regrets afterwards,"

North Korea said on Thursday it no longer wanted to deal with U.S. Secretary of State Mike Pompeo and said he should be replaced in talks by someone more mature, hours after it announced its first weapons test since nuclear talks broke down.

Secretary of State Mike Pompeo began his first trip to Pyongyang since U.S. President Donald Trump's summit with leader Kim Jong Un last month with a vow to nail down the specifics of Kim's commitments on denuclearization.