Five people killed in a murder-suicide in a Tucson home were all members of the same family, police said Wednesday.

Police said 25-year-old Christopher Carrillo killed his family before turning the gun on himself.

The others killed were 58-year-old Raul Carillo, 53-year-old Karen Saari, 32-year-old Erik Carrillo and 17-year-old Isela Rodriguez.

The bodies were found Tuesday evening by a man who went to the single-story house, police say.

Police did not know what lead to the shooting and an investigation is ongoing.

Details were sparse, but all of the dead had signs of gunshot trauma, police Sgt. Pete Dugan said.

Authorities weren't actively searching for suspects because they believe it was a murder-suicide, he said.

"They are trying to figure what took place," he said.

The shootings occurred in a blue-collar neighborhood on the south side of Tucson that residents said has seen an uptick in drug dealing recently.

The home had a no-trespassing sign on the door, and two tricycles and a small basketball court out front. An abandoned home stood on one side of the residence.

Neighbor Araceli Zatarain said a family of four has lived in the home for more than 20 years. She said police officers arrived at the home with guns drawn and demanded that one of the family's sons come out. Police later went inside, where they found the bodies.

Police Chief Roberto Villaseñor told the Arizona Daily Star that all five appeared to have been shot sometime Tuesday, and the bodies were found in different areas of the house.

Villaseñor said officers have been called to the home before, but details weren't immediately available.