A United States Web site monitoring North Korea says that the regime is preparing to build a safe stand for visitors to observe the explosive closure of its Punggye-ri nuclear test site.

38 North said on Saturday in an article, that satellite imagery from May 15 shows four rows of objects previously identified near the West Portal have been significantly altered and have increased substantially in height.

The report said an improved pathway has also been installed leading uphill to this area from a dirt road below.

It speculated that these rows of objects might be accumulated tunnel timbers or other building materials that are being reclaimed during the site dismantlement effort and could be part of an effort to create a platform for visitors to safely observe the explosive closure of all three portals.

North Korea said earlier this month that it would publicly dismantle its nuclear test site and hold a ceremony for the dismantling between May 23 and 25, and invite journalists from the United States, South Korea, China, Russia and Britain to witness the dismantling process.

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