If confirmed, it's another disappointing finding on North Korea's weapons activities.
According to CNN on Wednesday, satellite imagery provided by the Middlebury Institute of International Studies at Monterey, shows North Korea has been expanding a key long-range missile base in Yeongjeo-dong -- even after the first North Korea-U.S. summit in June.
Experts told CNN that the facility, which has long been familiar to the U.S., is a suitable location to base the North's newest long-range missiles, including those that can carry nuclear warheads to the U.S. mainland.
The images also identify a new, previously-unknown facility, just eleven kilometers away from the Yeongjeo-dong base.
It's unclear whether they are separate sites, or whether one is a sub-base to another.
The images also suggest North Korea was building a large underground facility in 2017, and the regime continued construction up until this August.
According to South Korea's Joint Chiefs of Staff, the missile base is one of the sites closely being monitored by Seoul and Washington.
The foreign ministry did not comment in detail, but said it will continue to work with the U.S. to achieve the denuclearization on the Korean Peninsula.
This isn't the first report voicing skepticism toward North Korea's commitment to denuclearize.
Washington-based think tank CSIS reported last month that it had identified 13 undeclared North Korean missile bases.
They reflect concerns within the U.S. that months of dialogue with the North has done nothing to stop the regime from developing its weapons programs.
Many have also argued that Trump is being played by Kim.
There are also questions over the progress being made in pushing Pyeongyang toward complete denuclearization, and on the need for a second Kim-Trump summit.
Park Hee-jun, Arirang News.