(CNN) North Korea is moving its nuclear and ballistic weapons to hide them from potential US military strikes, according to a UN Security Council diplomat citing a confidential UN report.

The North Korean nuclear and missile program remains intact and shows no change in North Korea's behavior, says the bi-annual report, even as US President Donald Trump confirmed his second summit with North Korean leader Kim Jong Un will take place later this month in Vietnam.

Last week, Trump praised North Korea for "tremendous progress" in negotiations, but the source told CNN this report indicates Pyongyang is trying to keep its nuclear and ballistic program ready to launch.

The UN diplomat said the report found "evidence of a consistent trend on the part of the DPRK to disperse its assembly, storage, and testing locations."

The panel of experts that compiled the report was established following multiple UN Security Council resolutions aimed at pressing Pyongyang to cease nuclear tests and missile launches. The report was submitted to a 15-member UN Security Council sanctions committee on Friday, the source told CNN.

Read More