http://canton.patch.com/articles/suspicious-vehicle-containing-propane-tanks-found-in-canton
“A custodian at the Bay State School of Technology reported seeing a suspicious-looking vehicle in the parking lot of 225 Turnpike St. to Canton Police Tuesday morning. The vehicle reportedly contained propane tanks, with one being connected to the vehicle’s engine with a hose, according to Canton Police Sgt. Robert Gooley.”
vehicle running off of natural gas would be normal ... will go to posted thread to read to see if anything else.