Grantsville Mayor Brent Marshall said the victims and the shooter are all related, the newspaper reported.
“It’s an unfortunate tragedy that has taken place here this evening,” Marshall said. “And I’m sure it will take days or even longer to try and piece together what brought all of this one and why it happened, if we ever get to know why it happened. It’s upsetting. This is normally a very quiet neighborhood, and any time you have children involved in something, it becomes very emotional, very fast.”
Lt. Robert Sager told FOX 13 TV that the department is treating the deaths as homicides.
Police didn’t release the names of the victims or the suspected Grantsville shooter, who was arrested shortly after police arrived at the home just after 7 p.m. Friday. The injured person was taken to a hospital, police said.
Marshall and Tooele County Sheriff Paul Wimmer were on scene as police tried to piece together what happened in home.
Cpl. Rhonda Fields told the Deseret News that multiple agencies responded after neighbors heard gunshots.
Gov. Gary Herbert tweeted his condolences.
“Our hearts are broken by the horrible news coming out of Grantsville tonight,” he said. “We mourn over the loss of innocent lives.
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