North Korea is able to produce a miniature nuclear bomb small enough to fit on an intercontinental ballistic missile, assessments from U.S. intelligence services told the Washington Post.

The assessment, completed in July by the Defense Intelligence Agency (DIA), gives the same conclusions as another one by the Japanese Ministry of Defense released last week that said North Korea can produce miniaturized nuclear bombs.

"The IC (Intelligence Community) assesses North Korea has produced nuclear weapons for ballistic missile delivery, to include delivery by ICBM-class missiles," an excerpt of the report stated.

According to the Washington Post, the U.S. determined in July that Kim Jong Un currently has up to 60 nuclear weapons at his disposal, although some believe the number is smaller. Since 2006, North Korea has conducted five nuclear tests; the most recent one took place in September 2016.

In the summer of 2016, North Korea launched two successful ICBM tests capable of hitting the U.S. mainland, although some U.S. experts doubt whether North Korea's ICBMs could successfully bring the miniaturized bomb to the U.S.

The DIA's latest assessment shows that North Korea's nuclear program is progressing faster than American experts thought and comes after U.S.-led U.N. sanctions against the Hermit Kingdom.