Recent commercial satellite imagery indicates North Korea is excavating a new tunnel at the Punggye-ri nuclear test site possibly for another atomic experiment.
 
North Korea-focused Web site 38 North released the analysis Wednesday based on satellite imagery from October and November.
 
It said the tunnel is in a new area of the site in addition to the three others where the North has either conducted nuclear tests or excavated tunnels in the past.
 
It added there are no indications a nuclear test is imminent, but the new tunnel adds to North Korea’s ability to conduct additional detonations at Punggye-ri over the coming years.