Abohar: Thirteen persons, including three from Punjab, were injured as a Lok Parivahan (public transport) bus collided with a tractor-trailer and thrasher on the highway near Sriganganagar on Saturday. Police officials said the bus, on contract with the Rajasthan state transport, was on the way to Bikaner. It collided with a tractor-trailer in a bid to overtake it and later collided with a thrasher near Takharwali village. OC