Updated

A man fatally shot his ex-girlfriend's roommate and a neighbor who came to help inside an Indiana home, then killed himself a few miles away as deputies approached his car, authorities said Tuesday.

The shootings, which occurred Monday and left two others wounded, started with a fight between 21-year-old Andrew Parish and his 19-year-old ex-girlfriend in a subdivision in the southern Indianapolis suburb of Franklin, Police Chief Tim O'Sullivan said during a news conference Tuesday.

When neighbor Ernest Jasper and his two sons, ages 21 and 18, rushed to the home to help, Parish opened fire on Jasper and the man's oldest son before also shooting 19-year-old Sara Davidson and the ex-girlfriend's mother, O'Sullivan said.

Davidson died at the scene and Jasper, 46, died at a hospital. Jasper's wounded son was listed in stable condition at a hospital Tuesday, while the ex-girlfriend's mother was treated and released, O'Sullivan said.

The ex-girlfriend was not injured.

Johnson County Sheriff Doug Cox said Parish's car was spotted in a rural area outside Franklin and that he shot himself with a rifle as deputies approached his vehicle.

O'Sullivan said Parish wrote a suicide note that he left at another home before going to his ex-girlfriend's house.

"The note was written prior to any of this going on," the police chief said.

Parish used a handgun in the shootings at his former girlfriend's home, but shot himself with an AK-47 assault rifle, authorities said.

No previous domestic violence had been reported between Parish and his former girlfriend, police said, adding that he was arrested two years ago for criminal mischief.