Kim "guided the test-fire of newly developed super-large multiple rocket launcher on Saturday," the Korean Central News Agency said. "The test-fire proved that all the tactical and technological specifications of the system correctly reached the preset indexes."

The KCNA added that Kim underscored the need to push for "an indomitable offensive campaign" and intensify the development of its own style of strategic and tactical weapons "for resolutely frustrating the ever-mounting military threats and pressure offensive of the hostile forces."

On Saturday, South Korea's military announced that the North fired two projectiles presumed to be short-range ballistic missiles off its east coast, saying both flew around 380 kilometers at a maximum altitude of 97 km.

The firings marked the ninth round of such launches this year and the seventh round in about just a month since late July. The North last launched two projectiles presumed to be short-range projectile missiles on Aug. 16, though Pyongyang later claimed that it tested a "new weapon," without providing more details.

North Korea has conducted these weapons tests in protest against a joint military drill between South Korea and the United States, which it has long denounced as a rehearsal for invasion.

Earlier this month, US President Donald Trump said North Korean leader Kim made a "little apology" in a letter to him for testing short-range missiles and promised that the testing will stop after the end of the military exercise.

As the exercise concluded last week, speculation arose that Washington and Pyongyang might soon resume their stalled denuclearization talks. Top US nuclear envoy Stephen Biegun's trip to Seoul last week, which coincided with the end of the military drill, also raised the prospect of talks.

North Korea, however, has doubled down on its criticism of South Korea and the US On Friday, North Korean Foreign Minister Ri Yong-ho issued a rare statement in the name of the country's top envoy and warned that it would be a miscalculation if the US confronts Pyongyang with sanctions.

Ri said that Pyongyang is ready for both dialogue and a standoff, but it will remain "the biggest threat" to Washington for a long time should the US stick to a hostile stance. He even strongly slammed US Secretary of State Mike Pompeo, his possible counterpart when talks resume, and called him "the diehard toxin of the US diplomacy" for hampering talks between the two countries.

The criticism came a day after a spokesperson for the North's foreign ministry said that the North has no interest in dialogue as long as South Korea and the United States keep up military threats against it, citing Seoul's move to introduce high-tech fighter jets from Washington.

Experts see the North's recent sharp-worded statements as apparently signaling that Pyongyang might not be in a rush to resume bilateral nuclear talks. Some see it as intended to strengthening its negotiation leverage before coming out for talks.

Denuclearization talks between Washington and Pyongyang have been stalled since the no-deal breakdown of their February summit in Hanoi. They failed to find common ground for Pyongyang's denuclearization steps and Washington's sanctions relief.

Trump and Kim agreed to restart working-level talks within several weeks when they met at the inter-Korean border on June 30.

The talks were expected to be held in mid-July, but they have not taken place amid tensions caused by the North's recent missile and projectile launches. (Yonhap)