SEOUL: North Korean leader Kim Jong Un supervised a parachuting drill of military sharpshooters and vowed to build an “invincible army,” displaying more defiance even as the United States and South Korea called off their own exercises to create space for nuclear diplomacy.

The report Monday by the Korean Central News Agency came hours after President Donald Trump in a tweet urged Kim to “act quickly, get the deal done” while hinting at another summit, writing, “See you soon!”

At an Asian defense ministers’ conference in Bangkok on Sunday, US Defense Secretary Mark Esper said the United States has indefinitely postponed a joint military exercise with South Korea in an “act of goodwill” toward North Korea. Diplomats have been pushing to resume stalled nuclear talks ahead of Kim’s end-of-year deadline for the Trump administration to salvage the diplomacy.

North Korea has publicized two military drills in three days. A report Saturday said Kim urged combat pilots to prepare against enemies “armed to the teeth” while attending a flight demonstration.

KCNA published photos that showed Kim posing with North Korean air force sharpshooters and soldiers who used white parachutes to land on a training field.

Kim while supervising the drill said it’s “necessary to wage a drill without notice under the simulated conditions of real war” for improving his military’s war readiness and build it into an “invincible army,” KNCA said. Kim did not make any specific comments toward Washington or Seoul in the report.

North Korea has been ramping up missile tests and other military demonstrations in recent months in an apparent pressure tactic over the talks.

Negotiations have faltered since a February summit between Kim and Trump in Vietnam, which broke down after the U.S. rejected North Korean demands for broad sanctions relief in exchange for a partial surrender of its nuclear capabilities.

(Agencies)