Story highlights There are growing intelligence indicators of fresh and concerning activity inside North Korea

The Trump administration is reviewing whether there are fresh options for dealing with North Korea

(CNN) The US intelligence community and the Defense Department are increasingly anticipating that North Korea will soon undertake a new round of testing of its missile and nuclear program, according to half a dozen US officials.

The officials are closely watching the regime's programs and there are growing intelligence indicators of fresh and concerning activity inside North Korea. The major source of that intelligence for the US is spy satellites that survey the regime from overhead, so there is little ability to fully understand what leader Kim Jong-un may decide to do.

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At the same time, these officials said, North Korea is taking fresh steps to disguise its activities, knowing satellites are overhead watching. There is intelligence indicating the regime is moving equipment to areas they have not used before, believing the US cannot track them there. As always, the regime sometimes moves vehicles, launchers and personnel around without any launches or tests, simply hoping to confuse the US, officials say.

In an unusually detailed public acknowledgment of what may be coming, Gen. Joseph Dunford, chairman of the Joint Chiefs of Staff, issued a statement after he spoke to his South Korean counterpart, Gen. Sun Jin Lee, on Tuesday.

Dunford said the two "assessed changes in North Korea's nuclear and missile threat" but then went on to say the two "discussed response options."

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