This photo, provided by North Korea's official Korean Central News Agency, June 27, shows the North's missile test conducted the previous day that it claims has proven its multiple warhead capability. Yonhap

North Korea has test-fired a new tactical ballistic missile capable of carrying a super-large warhead, state media reported Tuesday, a day after South Korea said the North fired two missiles and one of them could have failed.

North Korea successfully launched the Hwasong-11Da-4.5 missile capable of carrying a 4.5 ton-class super-large warhead Monday, according to the Korean Central News Agency (KCNA).

"The test-fire was conducted with a missile tipped with a simulated heavy warhead to verify flight stability and hit accuracy at the maximum range of 500 kilometers and the minimum range of 90 km," the KCNA said.

It added that the country will conduct another test of the missile in July to "verify flight characteristics, hit accuracy and explosion power of super-large warhead at the medium range of 250 km."

South Korea's Joint Chiefs of Staff (JCS) said Monday that North Korea fired two ballistic missiles in a northeastern direction from a western region. One of them flew about 600 kilometers before landing in the East Sea, but the other traversed only about 120 km before its trail disappeared from radar.

The JCS said the second missile appears to have flown abnormally during the early stage of its flight and that if it exploded in midair, its debris could have fallen inland.

A super-large warhead is among a list of high-tech weapons that North Korean leader Kim Jong-un vowed to develop at a party congress in 2021, including a spy military satellite and solid-fuel intercontinental ballistic missiles.

Despite its claimed success, North Korea's state media did not publish related photos, nor did the Rodong Sinmun, the North's main newspaper targeting the domestic audience, carry related reports.

The latest launch came less than a week after North Korea fired a ballistic missile toward the East Sea.

Pyongyang claimed it had successfully conducted a multiple warhead missile test, but South Korea's military dismissed it as "deception," saying the launch ended in failure as the missile exploded in midair.

North Korea's latest provocation also came after South Korea, the United States and Japan wrapped up the three-day multi-domain "Freedom Edge" exercise Saturday, involving a U.S. aircraft carrier and fighter jets.

North Korea denounced the drills Sunday, vowing to take "offensive and overwhelming" countermeasures against what it called an attempt to strengthen a military bloc.

The North's leader Kim and Russian President Vladimir Putin held summit talks in Pyongyang on June 19 and signed a new partnership treaty that calls for the two nations to offer military assistance "without delay" if either comes under attack.

Experts raised speculation that the latest missile launch could possibly be a test of missiles intended to be exported to Russia for use in its war in Ukraine. (Yonhap)