the explosions were of a CNG cylinder, 6 of them were in the bus, this is a very big problem for pakistan which we have never realized, inadequately trained people install these kits on 80% vehicles, hence you get faulty pipes and other hazards, and make a time bomb of the vehicle.
It is high time we induct more public transport and reduce the vehicles on the road, hence reducing the consumption of oil, and then raise the price of CNG and bring down petrol prices, petrol isnt volatile like CNG, and more safety standards should be put in place. In Oman, it is mandatory that a fire extinguisher and a medical kit be present in the car or else you get fined really heavily, the equivalent to 300 rials or so. And one rial is apprx. equal to 224 rupees!