North Korea on Thursday unveiled footage of its latest test-firing of a submarine-launched ballistic missile(SLBM).

The North’s state-run Korean Central Television(KCTV) carried photos and video footage showing the loading of the SLBM onto a submarine and its launch from various angles.

KCTV reported technical details, citing its cold launch capabilities, the use of solid fuel and striking accuracy.

North Korean leader Kim Jong-un was seen at the site, praising the launch as “the greatest success and victory.”

He was quoted as saying that the latest SLBM test shows that the country has “joined the front rank of the military powers fully equipped with nuclear attack capability.”

According to Seoul's Joint Chiefs of Staff, the projectile was launched at around 5:30 a.m. Wednesday towards the East Sea off the port city of Sinpo, South Hamgyong Province.

It reportedly flew around 500 kilometers before it dropped 80 kilometers into the Japanese Air Defense Identification Zone.

It immediately prompted denouncement from Seoul, Washington and Tokyo as well as the European Union, who all pointed out the North has again violated the UN Security Council resolutions that ban the regime from conducting ballistic missile-related activities.

The White House said it won't rule out the possibility of additional sanctions against North Korea following its latest SLBM test.

The UN Security Council(UNSC) on Wednesday held an emergency meeting to discuss North Korea's test firing of a ballistic missile from a submarine.

At the closed-door session held at the request of South Korea, the U.S. and Japan, member states were said to be forming a consensus that Wednesday's launch came in violation of the UNSC resolutions.

The claimed success of the latest SLBM test-launch, which comes on the heels of the Musudan intermediate-range missile in June, accentuates a growing nuclear and missile threat from the reclusive regime.

The SLBM launch is partly regarded as a show of force against the ongoing South Korea-U.S. joint annual military exercise, known as Ulchi-Freedom Guardian(UFG).

It also conveys the regime’s confidence that it can cope with an internal crisis, exposed by a series of defections by North Korean elites, by continuing provocations toward the outside world.

The North has stepped up efforts to develop SLBMs with leader Kim reportedly having ordered his officials to accelerate the development of “means of transportation” for nuclear weapons.

Chief analytics officer for All Source Analysis Joseph Bermudez said at a forum this week that North Korea is developing bigger submarines than the two-thousand-ton Sinpo-class ones that it currently operates. This is in an apparent move to acquire the ability to run multiple SLBM launches simultaneously.

Military officers and scholars in the South are saying that it is urgent for Seoul to develop practical means to counter the growing SLBM threats from the North.

One of the suggestions is an “underwater Kill-Chain” preemptive strike system.