(KCNA)

Satellite images taken just after the collapse of February 2019's summit between President Donald Trump and Kim Jong Un show North Korea rebuilding a long-range-missile test site it pledged to dismantle, experts say.

The photographs are from March 2, 2019, two days after Trump's meeting with Kim ended without agreement on the nuclear disarmament of North Korea.

They show North Korea rebuilding its long-range-rocket site at Sohae, according to analysts from the Center for Strategic and International Studies.


Previously, the Tongchang-ri facility had been used for satellite launches using missile technology North Korea is banned from using by the UN, the analysts said.

(CSIS/Beyond Parallel/DigitalGlobe 2019)

A South Korean lawmaker who was present at a closed-door briefing by South Korean intelligence March 5, 2019, told the Associated Press that the structures being restored at the site included roofs and building doors.

The lawmaker said the National Intelligence Service director, Suh Hoon, told them that North Korea could be preparing to restart tests of long-range missiles if talks with Washington conclusively collapsed.

He suggested that another possibility was that the site could be dramatically blown up in a display of commitment to denuclearization if talks with the US resulted in a deal.

North Korea had begun to dismantle the facility following an agreement reached at June 2018's Singapore summit between Trump and Kim, and it had been dormant since August 2018, experts say.

According to the monitoring website 38 North, efforts to rebuild structures at the site began between Feb. 16 and March 2, 2019. Trump's summit with Kim began Feb. 27, 2019.

Its experts say the images show the rail-mounted processing building, where launch vehicles are worked on before being moved to the launch pad, are being rebuilt.

They also identified support cranes, new roofs, and an engine support structure being developed at the test stand.

Researchers of Beyond Parallel, a CSIS project, describe this image of the Sohae Satellite Launching Station launch pad as showing the partially rebuilt rail-mounted rocket transfer structure in a commercial satellite image taken over Tongchang-ri, North Korea.

(CSIS/Beyond Parallel/DigitalGlobe 2019)

In a Fox News interview March 5, 2019, the White House national security adviser, John Bolton, warned that new sanctions could be imposed on North Korea if the country did not further commit to denuclearization.

"If they're not willing to do it, then I think President Trump has been very clear," he said.

"They're not going to get relief from the crushing economic sanctions that have been imposed on them, and we'll look at ramping those sanctions up in fact."

Sanctions on North Korea are already restrictive, but experts at the conservative-leaning Heritage Foundation believe there is room for tougher measures to be imposed on Chinese financial entities accused of aiding North Korea's missile and nuclear programs.

The Council on Foreign Relations has argued that the existing sanctions regime requires better enforcement if it is to be effective.

This article originally appeared on Business Insider. Follow @BusinessInsider on Twitter.