North Korean officials have announced on Thursday that the country has "ratified" an attack against the United States.
North Korean State T.V. said that the so-called attack could potentially involve a diversified nuclear strike.
It also came with a warning that "the moment of explosion is approaching fast."
U.S. officials have received intelligence that North Korea plans on launching a mobile ballistic missile in the coming days or weeks.
The announcement follows a report by South Korea's government that it appeared that North Korea has moved a mid-range missile to a launch pad in the country's East.
North Korea has been stepping up its rhetoric after the country was hit with new U.N. sanctions for conducting a third nuclear test in February.