Among those rescued were three Americans at the Langjökull glacier, officials confirmed to ABC News on Friday.
Mountaineers of Iceland, based in Reykjavík, said the group that got stuck was the only tour that hadn't been canceled because of bad weather on Tuesday, according to a statement from the company.
"We clearly made a mistake by going into the ice cave,” Haukur Herbertsson, the manager of operations for Mountaineers of Iceland, told reporters at a press conference. “We probably made more mistakes than that. At this point I don’t know what all of them are.”