A tornado ripped across a Boy Scout camp in Iowa on Wednesday, killing at least four people and injuring several others in the midwestern state, a scout official said.

Lloyd Roitstein, president of the Boy Scouts of Mid-America Council, told CNN that the Little Sioux Scout Ranch was "virtually destroyed" after the twister ripped tents off the ground at the 1,800-acre (730-hectare) compound.

"There's nothing left in there," Roitstein told the news network. "There are four confirmed dead, numerous injured."

The boys at the camp were between 13 and 18 years old and were there for a week of training, he said.

About 120 people, including 93 children, were at the camp when it was struck, CNN said, citing Iowa Public Safety Commissioner Gene Meyer.