North Korea 'has miniature nuclear warhead', says Kim Jong-un

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North Korea's Rodong Sinmun newspaper showed a picture of Kim Jong-Un inspecting the purported nuclear warheadImage source, Rodong Sinmun
Image caption,
North Korea's state media showed a picture of Kim Jong-Un inspecting the purported nuclear warhead

Kim Jong-un says North Korean scientists have developed nuclear warheads small enough to fit on ballistic missiles.

State media published images showing the North's leader standing next to what it said was a miniaturised weapon.

The claim is impossible to verify from the images alone and experts have long cast doubt on such assertions.

The North has stepped up its bellicose rhetoric in response to the UN imposing some of its toughest sanctions.

The move by the Security Council came after the North conducted its fourth nuclear test and launched a satellite, both of which broke existing sanctions.

Image source, KCNA
Image caption,
Earlier pictures released by North Korean news agency KCNA showed Kim Jong-un at what it said was the testing of a multiple launch rocket system

In recent days, Pyongyang has threatened to launch an "indiscriminate" nuclear strike on the US and South Korea, as they began their largest ever round of annual military exercises.

The drills, known as Foal Eagle and Key Resolve, routinely generate tension.

Claims questioned

The claim from Mr Kim was made as he inspected a nuclear facility on Wednesday.

"The nuclear warheads have been standardised to be fit for ballistic missiles by miniaturising them," state news agency KCNA quoted him as saying.

"This can be called true nuclear deterrent," he added.

He also inspected nuclear warheads designed for thermo-nuclear reaction, the type used in a hydrogen bomb, KCNA said.

If the claim is true and North Korea can put nuclear warheads on to the tips of its ballistic weapons, it would represent a clear threat to the North's neighbours and the US.

In October 2014, the commander of US forces in South Korea, Gen Curtis Scaparrotti, told reporters that he believed the North had the capability to miniaturise a nuclear device.

Image source, AFP/Getty Images
Image caption,
Marines from South Korea (foreground) and the US (background) have been taking part in joint military drills

In May 2015, the North Korea's National Defence Commission said the country had succeeded in miniaturising nuclear weapons.

But the validity of the nuclear boasts has been widely questioned. Experts also still doubt the North's claim that the nuclear test it conducted in January was of a hydrogen bomb.

In addition to the new UN sanctions, which target luxury goods, financing and trade, South Korea has also announced its own measures against the North, which includes blacklisting individuals and entities it believes are linked to the weapons programme.

The US and South Korea are currently discussing the possible deployment of a US missile defence system to the peninsula, a move strongly opposed by North Korea, Russia and China.