North Korean leader Kim Jong Un said the country has miniaturized nuclear warheads to be mounted on ballistic missiles as he inspected the work of nuclear workers, the North's KCNA news agency reported on Wednesday, Reuters reported.
"The nuclear warheads have been standardized to be fit for ballistic missiles by miniaturizing them, he noted, adding this can be called true nuclear deterrent," KCNA said.
North Korea conducted its fourth nuclear test in January and claimed it was a successful hydrogen bomb test, which was disputed by many experts and the governments of South Korea and the United States.