US Air Force veteran, 51, shoots his wife and their 12-year-old triplet daughters before setting fire to their home and killing himself in double murder suicide nine days after she filed for divorce

A US Air Force veteran has murdered his wife and one of their 12-year-old triplet daughters before setting their home on fire and killing himself in a shocking double murder.

Bob Orsi, 51, killed his wife Charlene, 44, and one of the triplet daughters at their home in Wetumpka, Alabama, on Saturday at around 6pm. The other two were both shot multiple times but survived and are in hospital and the couple's 13-year-old daughter escaped unharmed.

After opening fire on his family, Orsi set fire to their home and then killed himself. Court records show that Charlene filed for divorce nine days ago and had sole custody of their four daughters.

Charlene Orsi (front), 44, was murdered along with one of her 12-year-old triplet daughters. The other two triplets were shot multiple times and are recovering in hospital and her 13-year-old daughter (shown back left) was able to escape. Charlene filed for divorce nine days ago