PHOENIX -- Around 10:45 a.m. Sunday, Mesa police responded to a call at Poston Junior High School at Adobe and 25th streets.
Some neighbors who had arrived at the school to exercise on the premises placed a call to the police after they "noticed a vehicle that appeared suspicious" in the south parking lot, Sgt. Tony Landato said.
The neighbors had only noticed one man inside who wasn't responding, but Mesa police took over and found an injured, unresponsive female.
The woman was transported to a hospital but soon pronounced dead there.
The man was already dead in the vehicle when police arrived.
Landato said it appears to be a murder-suicide situation, and he could not disclose the nature of the couple's deaths.
Landato said the department is also working on identifying the two deceased individuals and figuring out their relation to each other. He said they are both adults and don't appear to be related to the school where they were parked.