Police in Utah have identified a man who was among three victims, including a 2-month-old girl, found fatally shot inside a northwest Salt Lake City home.

Authorities said Saturday that the body of 28-year-old Dakota Smith was discovered alongside 50-year-old Heike Poike and her 2-month-old granddaughter, Lyrik Poike.

Salt Lake City police Det. Richard Chipping says 32-year-old Alexander Hung Tran was arrested after officers found him the night before inside the home with a gun.

Police were there looking for relatives of an 8-year-old boy who was not picked up from school Friday.

Authorities say Tran lived in the basement and allowed the victims to live on the main floor.

According to jail documents, Tran said he was responsible for the deaths.

It wasn't known if he had an attorney.