Photo: ODT filesPolice are investigating a suspected arson after discovering a fire inside an allegedly stolen BMW in Mosgiel. Constable Elijah Stafford-Rogers, of Dunedin, said local units came across the black 2007 BMW in Puddle Alley about 12.40am today. ‘‘While stopping to check the vehicle, officers noticed a fire had recently been lit in the vehicle,’’ Const Stafford-Rogers said. The registered owner was contacted who claimed the vehicle had been stolen. A Fire and Emergency New Zealand spokeswoman said they responded two trucks from its Mosgiel station.