Rawalpindi: At least two laborers have died due to boiler explosion in factory in the area of Taxila police.The boiler was installed in the mid of Margalla hills to extract cables by melting the tyres.According to police boiler exploded due to filling of excessive gas and two laborers died being hit by lid of boiler.Local police said case has been registered against owners of factory. Such factories built in three different locations have been shut in the area.