More evidence has emerged of significant activity at North Korea’s shuttered Punggye-ri nuclear test site, as the country continues repair work at the facility that would allow it to conduct its seventh atomic test.

Satellite imagery taken earlier this week has shown the construction of new buildings, movement of lumber and an increase in equipment and supplies immediately outside a new entrance to Tunnel No. 3, indicating that construction work is likely happening both inside Tunnel No. 3 and outside in surrounding areas.

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