WEST MIFFLIN, Pa. (AP) — Police in Pennsylvania say a 6-year-old boy has been shot to death by his 10-year-old brother while the two were home alone. 
 
 Allegheny County say officers and paramedics arrived at the mobile home in West Mifflin, near Pittsburgh, at about 9:45 a.m. Wednesday to find the 6-year-old with a gunshot wound to the head. He was taken to a hospital, where he died from the injury. 
 
 Investigators determined the boy's 10-year-old brother fired the gun in the mother's bedroom. 
 
 Superintendent Coleman McDonough says the boys' mother was at work when the shooting happened. He says the 10-year-old first called his mom and then called 911 at her urging. 
 
 The investigation is ongoing, and McDonough says there's "no excuse for a weapon to get in the hands of a child." ||||| The death of Julian Hoffman is under investigation by Allegheny County detectives. 
 
 6-year-old shot, killed by his 10-year-old brother while boys are home alone 
 
 The death of a 6-year-old boy who police said was shot by his 10-year-old brother while the children were at home by themselves has been ruled a homicide. 
 
 Julian Hoffman died of a gunshot wound to the head, the Allegheny County medical examiner's office said Monday. 
 
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 No charges have been filed while the investigation continues. County police Superintendent Coleman McDonough has said there were no indications that the shooting was intentional. 
 
 Julian was shot at the New Colony Mobile Home Park on Dover Lane, where police responded to a 911 call shortly before 9:45 a.m. Aug. 10. 
 
 Due to his age, the older brother has not been publicly identified. Investigators have also not said how the child got access to the gun. 
 
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 The firearm, a 9mm pistol, is legally owned by the boys' mother, who was at work when the shooting happened in her bedroom, McDonough said. 
 
 The mother has a live-in boyfriend, whose whereabouts at the time of the shooting were not immediately known, police said. 
 
 Julian's brother called the boys' mother first, then called 911 after the woman told him to, McDonough said. 
 
 Many neighbors were shaken by the boy's death. 
 
 "I can't believe it could happen," said David Meier, who lives across from the boys. "This is the reason why if you have firearms, they say lock them up so your children can't get them."
– Police in Pennsylvania say a 6-year-old boy was shot to death by his 10-year-old brother while the two were home alone. Allegheny County police say officers and paramedics arrived at the mobile home in West Mifflin, near Pittsburgh, at about 9:45am Wednesday to find the 6-year-old with a gunshot wound to the head, the AP reports. He was taken to a hospital, where he died from the injury. Investigators determined the boy's 10-year-old brother fired the gun in the mother's bedroom. Superintendent Coleman McDonough says the boys' mother was at work when the shooting happened. He says the 10-year-old first called his mom and then called 911 at her urging. The investigation is ongoing, and McDonough says there's "no excuse for a weapon to get in the hands of a child." No charges have been announced. The mother's boyfriend also lives at the residence, though his whereabouts at the time of the shooting are unknown. Neighbors at the New Colony Mobile Home Park say they are shaken by the boy's death. "I can't believe it could happen," resident David Meier tells Action News 4. "This is the reason why if you have firearms, they say lock them up so your children can't get them."