An Air Force veteran killed himself after shooting his wife and three of their daughters in Alabama on Saturday, according to authorities.

Robert Orsi was upset after his wife, Charlene — who also served in the Air Force — filed for divorce, the Alabama News Network reported.

The Elmore County Sheriff’s Office posted on its Facebook page that the divorce was over Robert Orsi’s alleged drug use.

Orsi allegedly shot and killed his wife under their carport, then went inside their home and lined up his 12-year-old triplet daughters on the floor to shoot them. One was killed, but two survived.

Orsi’s 13-year-old daughter escaped and called 911 from a neighbor’s house, according to WEAR-TV.

After the shootings, Orsi doused the home with gasoline and set it on fire, but he didn’t see that two of his 12-year-old daughters made it out of the house, even with multiple gunshot wounds. The third 12-year-old was found dead in the house, along with Orsi.

The surviving daughters were taken to a local hospital and were in stable condition, according to the sheriff’s office.