A police officer accidentally fired a pistol inside a vehicle parked near the venue of the World Exposition in Osaka, police said Monday, adding that no one was injured.The 28-year-old male riot squad member mistakenly pulled the trigger when putting the pistol back in its case at around 7 p.m. Sunday, after finishing a security shift at the international event in the western Japan city, according to the Osaka police.The handgun was fired downward, with the single discharged bullet making a hole in a seat and leaving a mark where it appears to have been embedded in the floor of the vehicle,…READ FULL ARTICLE