A tornado destroyed mobile homes and injured at least five people late Friday afternoon in Wright.
Crews were also searching for a number of people reported missing after the tornado touched down at about 4:51 p.m., Campbell County Sheriff Bill Pownall said shortly after 7 p.m.
He said 30 to 40 mobile homes were damaged, and some were destroyed, in the coal mining town of about 1,400 people 37 miles south of Gillette. An elementary school near the mobile home park also was damaged.
"We've had reports of injuries, but no firm number," he said. "We do know that five people were transported to Campbell County Memorial Hospital, and triage was set up in Wright at the high school."
Personnel from the sheriff's department, ambulance units, search and rescue, fire department and nearby coal mines were on the scene.
"There's a lot of debris in the area," Pownall said.
Saturday's Casper Star-Tribune will have more in-depth coverage.