North Korea said on Wednesday it had successfully test-fired a new submarine-launched ballistic missile.

One of the new weapons shown in during the parade was a submarine-launched ballistic missile.

Satellite images indicate Pyongyang is actively trying to develop its submarine-launched ballistic missile programme in this area, according to experts.

It would also modify a small number of existing submarine-launched ballistic missile, or SLBM, warheads to provide a nuclear option with a lower payload.