A California man on Monday fired on his two daughters before taking his own life, all while his grandchildren were inside the house.

According to a Fresno Bee report, 63-year-old Anthony Alvarez of Orosi, California killed one of his daughters, and injured the other early on Monday morning. Jennifer Kimble, the 37-year-old daughter who died, was shot multiple times and died at the scene. She was a cafeteria worker at a local elementary school and the mother of three children, a 13-year-old boy, an 11-year-old boy, and an 8-year-old girl. The other sister, 33-year-old Valerie Alvarez, was taken to a nearby hospital where she is reportedly in critical condition.

According to the Bee, the children’s father was at work during the time of the shooting. The 8-year-old reportedly called 911 when she heard gunshots. Authorities are currently investigating the motive for the shooting. The details of the incident, including a possible motive, have not been released.

Orosi is a small town of around 9,000 people just outside of Fresno.