JACKSON, MI - Four victims are being treated at Henry Ford Allegiance Health after all were shot in the head while sitting in a parked car outside of a house on the 500 block of Summit Avenue, police say.

One victim, a 20-year-old male, is in critical condition and in surgery, said Jackson Police Lt. Chris Simpson about 11:45 p.m. on Monday, July 11.

The other three victims are a 16-year-old female, a 19-year-old male and a 25-year-old male, police said.

Jackson Police Deputy Chief Elmer Hitt said the female was shot in the back of her head and was conscious and talking when police arrived at about 9:07 p.m.

Hitt said the female was the only victim on scene when police arrived. He said the three males were driven to Allegiance Health by one of the victims.

The 19-year-old was shot in the cheek and the 25-year-old was shot in the top of the head, Hitt said.

Simpson said the incident is being investigated as a drive-by shooting.

Hitt said a witness described what appeared to be a black GMC Envoy SUV driving northbound on Summit Avenue around the time of the shooting, but could not confirm if the vehicle was involved.

Hitt and Simpson both said this incident will be cross-referenced with a drive-by shooting that occurred at the same house exactly one month ago, June 11.

Hitt said at least one of the victims was at the residence when the previous shooting occurred. He said nobody was shot at that time, but a car in the area and the house were struck.

Anyone with information is asked to contact the Jackson Police Department Detective Bureau at (517) 768-8726 or Crime Stoppers of Mid-Michigan at (855) 840-7867.