CHETEK, Wis. — A frantic 911 call for help came too late for one of the victims of a triple shooting at a home at 611 26th St. about 9 p.m. Friday.

Police arrived at the scene to find John Hengst, 55, his ex-wife Brenda Turner, 55, and her daughter Natalie Turner, 17, all dead.

All three suffered gunshot wounds, said Chris Fitzgerald, spokesman for the Barron County sheriff’s department. Cause of death won’t be confirmed until autopsy results are back from the Barron County medical examiner’s office.

Police said they know the caller was a victim inside the house and that she was female but are not revealing who called or who did the shooting.

“We’re not calling it a murder-suicide, because we’re in the process of determining that,” Fitzgerald said. “We’re not looking for anybody. We’re just trying to figure out exactly what happened inside that house.”

UPDATE: Chetek man killed ex-wife, her daughter before killing self, Barron County sheriff says

Turner and Hengst divorced in August 2016, according to court records. Hengst was Natalie’s ex-stepfather, the Chetek Alert newspaper reported.

Detectives from the Barron County sheriff’s department with the assistance of the Rusk County sheriff’s office and the Wisconsin State Patrol are working together on the investigation.

“Our thoughts and prayers are with the families, friends and the Chetek community affected by this tragedy,” the department said in a press release.