Washington (CNN) President Donald Trump said Tuesday that new images indicate North Korea has begun dismantling "a key missile site" -- a step he says was promised by dictator Kim Jong Un after the two leaders met in Singapore last month.

"New images just today show that North Korea has begun the process of dismantling a key missile site, and we appreciate that," Trump said, an apparent reference to images of the Sohae Satellite Launching Station published Monday by the prominent monitoring group 38 North

Those images, captured between July 20 and July 22, show North Korea has indeed started to dismantle key facilities at the satellite launch station, a move analysts said represents "an important first step towards fulfilling a commitment" made by Kim during his summit with Trump.

"Since these facilities are believed to have played an important role in the development of technologies for the North's intercontinental ballistic missile program, these efforts represent a significant confidence-building measure on the part of North Korea," according to 38 North's Joseph Bermudez Jr.

"Most notably, these include the rail-mounted processing building -- where space launch vehicles are assembled before moving them to the launchpad -- and the nearby rocket engine test stand used to develop liquid-fuel engines for ballistic missiles and space launch vehicles."

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