San Diego Police evacuated  a Black Mountain Park parking lot last weekend after a man was found dead in his car with a sign alerting the public that his vehicle contained hazardous gas.

According to the San Diego Union-Tribune, the man’s vehicle was spotted in the the back parking lot of the 30-acre park off Carmel Valley and Black Mountain roads about 12:30 p.m.  The San Diego Fire-Rescue Department and hazardous materials  crew handled the vehicle while officers moved people away from the parking lot.  San Diego Fire Department spokesman Maurice Luque said the vehicle full of lethal hydrogen sulfide gas contained materials that were widely available.

No additional information was immediately available.