A "distraught" teenager in southwestern Michigan killed himself after fatally shooting another teen while playing with a gun, police said Tuesday.

The two shootings occurred Monday night in an alley in Kalamazoo. Police said a witness reported no argument or altercation between the 17-year-olds, who knew each other.

"Once the first person was shot and died at the scene, the shooter became distraught, according to the witness, and then took his own life. The evidence found at the scene confirms this," Capt. Victor Ledbetter said in a written statement.

The victims were identified as Marsavious Frazier and Daqarion Hunter. Hunter graduated from Loy Norrix High School in June, while Frazier was a student at Phoenix High School. Counselors were available Tuesday, the first day of school, to talk to students and staff who knew the victims.

Police didn't publicly disclose which victim was accidentally shot. But Jonathan Frazier said police told him that his son shot Hunter.

"We're devastated. We're sick as hell," Frazier told WOOD-TV. "My baby, man, he's gone. I don't know what else to do."

Nina Ricardo, who lives in the neighborhood, said she heard gunshots and rushed outside to round up her kids. Police said the gun wasn't stolen but wasn't properly registered.