KIM Jong-un is feared to be secretly mass producing biological weapons to unleash nightmarish plagues on US troops, a report has found.

Under the cover of a farm lab, it is claimed North Korean chemists could be weaponising some the world’s deadliest diseases such as smallpox, Black Death and cholera which could lay waste to millions of people if an epidemic was sparked.

3 Kim Jong-un is thought to be arming himself to the teeth with horrific weapons Credit: AFP or licensors

Radio Free Asia cited a report released by Belfer Centre of Harvard University’s Kennedy School, which says the rogue state already has biological weapons.

And it is feared that North Korea has the industrial facilities to mass produce them, flouting a UN ban on the doomsday weapons.

The chilling report states that the highly infectious diseases could be spread via a missile, drones, planes and sprayers.

North Korea's 200,000 special forces could also unleash the bio-weapons.

3 US Air Force B-1B bomber, centre, and two South Korean fighter jets F-15K fly over the Seoul Airport Credit: AP:Associated Press

The report states: “While nuclear programs can be monitored by the number of nuclear tests and the success of missile tests, weaponise and cultivating pathogens can stay invisible behind closed doors.

“Moreover, equipment used for BW production are often dual-use for agriculture, making external monitoring and verification virtually impossible.”

North Korea watchers also fear the hermit state could order its army of hackers to take control of US naval ships and make them crash into each other as well as to disable their weapons systems.

A new state-of-the-art ballistic missile submarine is thought to be under construction.

3 Experts believe changes at the base betray an impending operation

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