Construction spotted at N.Korea nuclear test site for first time since 2018 -report

FILE PHOTO: A North Korean flag flutters on top of a 160-metre tower in North Korea's propaganda village of Gijungdong, in this picture taken from the Tae Sung freedom village near the Military Demarcation Line (MDL), inside the demilitarised zone separating the two Koreas, in Paju, South Korea, April 24, 2018. REUTERS/Kim Hong-Ji/File Photo

SEOUL (Reuters) -Satellite imagery shows construction at North Korea's nuclear testing site for the first time since it was closed in 2018, analysts said on Tuesday, as a U.S. intelligence report warned the country could resume major weapons tests this year.

Images captured by commercial satellite on Friday showed very early signs of activity at the Punggye-ri site, including construction of a new building, repair of another building, and what is possibly some lumber and sawdust, specialists at the California-based James Martin Center for Nonproliferation Studies (CNS) said in a report.