A snowmobile driver accused of colliding with two teams of mushers in the Iditarod dog-sled race in Alaska over the weekend has apologized, saying that he had been drinking before the episode.

Alaska State Troopers arrested Arnold Demoski, 26, and charged him with assault, endangerment, reckless driving and criminal mischief for driving early Saturday morning into the teams of two racers, Aliy Zirkle and Jeff King. One of Mr. King’s dogs was killed in the crash, and two others were wounded but were expected to survive.

Mr. Demoski, who became emotional as he apologized in an interview, described the crash as an accident.

“I shouldn’t have been driving last night,” he said in an interview with KTUU, an NBC affiliate. “It wasn’t intentional, though.”