North Korea has reportedly displayed a new submarine-launched ballistic missile (SLBM) at a military parade in Pyongyang.

The new missile is said to be longer in size and carries the ‘Pukguksong-5’ label, as appeared from the photos released by state news agency KCNA.

It is being assumed by defence experts to be an upgrade over the SLBM dubbed as ‘Pukguksong-4′.

Overseen by North Korean leader Kim Jong-un, the parade also saw several missiles on show, including tanks and rocket launchers.

It is the second major military parade to be held in three months, Reuters reported. It was held in celebration of the conclusion of North Korea’s Eighth Workers’ Party Congress.

A statement posted by KCNA read as: “The world’s most powerful weapon, submarine-launch ballistic missiles, entered the square one after another, powerfully demonstrating the might of the revolutionary armed forces.”

In addition, North Korea reportedly showed off its new short-range ballistic missile, which is claimed to operate on solid fuel.

In an address during the Eighth Workers’ Party Congress, Kim was quoted by BBC as saying: “No matter who is in power in the US, the true nature and the true spirit of the anti-North Korea policy will never change.

“The development of nuclear weapons will be pushed forward without interruption.”

Meanwhile, Yonhap news agency noted that South Korea’s Joint Chiefs of Staff (JCS) is “analysing military items displayed during the parade”.