Three dead bodies found inside a home destroyed by a fire Thursday all had upper-body gunshot wounds, and the house was found to contain many rounds of ammunition and "incendiary devices" as well as firearms, police said Friday.
The bodies of three "middle-aged" adults - one male and two females - were discovered Thursday afternoon inside the residence at 525 N. Dalton Avenue, authorities said.
Their identities were not released, but neighbors and a relative said the dead were a brother and two sisters. The relative, who said his wife was a sibling to the deceased, said the family had been facing foreclosure.
The home had been foreclosed upon in April, county records show, and it was sold for $197,000 to a Los Angeles property company in May.
The bodies all had gunshot woulds to the upper body, according to a Azusa police Lt. Mike Bertelsen.
Witnesses reported a large plume of smoke coming from the garage area accompanied by "popping" sounds.
The structure was "well-involved in flames" when firefighters arrived.
County sheriff's arson investigators assisted Azusa police detectives in the investigation.
Investigators recovered "a number of firearms" and "thousands of rounds of ammunition" at the house, as well as "suspicious incendiary devices," police said.
Two dogs and cat were also found dead inside the home.