Heavy use of a joss paper burner led to a fire at a Hong Kong columbarium that sent ashes flying, injuring at least two people on Sunday.Police said that they received a report at 11.37am that a fire had broken out at Diamond Hill Columbarium.A preliminary investigation found that the fire was caused by an overheated exhaust fan connected to a joss paper burner, the force said.Firefighters arrived and put out the flames, which were classified as a No 1 alarm fire, the lowest in Hong Kong’s...