Washington (CNN) The United Nations nuclear watchdog agency says it has "grave concern" that North Korea continues to develop its nuclear weapons program.
A report Monday from the International Atomic Energy Agency noted that without direct access to North Korean weapons sites its information is limited, though it is monitoring the program through "more frequent collection of satellite imagery."
The report includes a detailed list of nuclear-related activities the agency believes have been underway in recent months mainly at the Yongbyon Nuclear Scientific Research Center, one of the country's major nuclear sites.
The IAEA report provides some of the most specific information made public so far about North Korea's activities. They include:
Secretary of State Mike Pompeo told the Senate Foreign Relations Committee in July that the regime is still making fissile material, but he gave no other details.
Pompeo has subsequently said the US still has a long way to go in discussions with North Korea to achieve the full denuclearization the Trump administration says North Korean leader Kim Jong Un promised.
In the interview, Trump pointed to an absence of missile or nuclear tests from Pyongyang as a measure of the success he's had in dealing with the reclusive regime, which last year was threatening the US mainland with nuclear strikes.
"I stopped (North Korea's) nuclear testing. I stopped (North Korea's) missile testing. Japan is thrilled. What's going to happen? Who knows? We're going to see," the President said.