A man apparently killed himself with toxic fumes inside his car after posting warning signs in the windows Saturday, according to San Diego police.

Officers found the 46-year-old Mira Mesa man’s body in his car, which was parked in the back corner of a strip mall parking lot on Carmel Mountain Road, north of state Route 56, next to a skateboard park in Rancho Penasquitos. Police evacuated the skate park as a precaution, cordoned off the parking lot, and called the San Diego Fire-Rescue Department and a hazardous materials crew.

Police said the man had used common household chemicals, which, combined, filled the car with toxic gas. Hazardous materials crews removed the items.