North Korea has apparently yet to begin work to dismantle any of its six known missile launch and engine test facilities and two ejection test stands, according to an analysis of recent satellite photos, despite a claim by U.S. President Donald Trump that the country's leader, Kim Jong Un, had told him it was "already destroying" a major testing site.

The North Korea-watching 38 North website said in an analysis released Friday that recent high-resolution satellite imagery had not identified any activity that could be associated with Kim's claim to Trump. Trump made the remarks at a news conference Tuesday after his historic summit with Kim in Singapore.

"Chairman Kim has told me that North Korea is already destroying a major missile engine testing site," he said. "That's not in your signed document; we agreed to that after the agreement was signed. That's a big thing — for the missiles that they were testing, the site is going to be destroyed very soon."