An Indian man has been arrested after allegedly trying to set himself on fire and shouting pro-Osama bin Laden slogans on an Indian Airlines flight.The 30-year-old was overpowered soon after the plane took off from Dubai for Hyderabad and handed over to police in Hyderabad, reports say.Police officials say he was found to be mentally unsound and a city court magistrate has referred him to a mental hospital.The Deccan Chronicle reported that the man pulled out a cigarette lighter and started burning his skin and clothes soon after the plane took off. He was also shouting: "Long live Osama," the report said. Leo/ORD