evidence of PW1 shows that on 31.12.2009, the tanker lorry KA01AE2119 was proceeding through the NH Road from Alappuzha to Kollam, when it reached at the place of occurrence, the vehicle hit against a Maruthi car No.KL 23 B 5418. As a result, gas bullet detached from the lorry fell on the road, the valve of the gas bullet got damaged and gas leaked. The local people, police and fire force entered into rescue operations, in the meanwhile, the gas tank blasted. Ext.A1 is the copy of FIR and A2 is the charge sheet. A3 is the scene mahazar and A4 is the vehicle mahazar. A5 is another mahazar and A6 is the AMVI report. A27, A33, A42, A47, A59, A54, A64, A69, A75, A80, A84, A89 postmortem report show that the death was due to the burn injuries sustained in the accident. PW2, PW3, PW4, PW5, PW6, PW7 and PW8, the legal representatives of the deceased persons, supported the evidence of PW1. Respondent examined RW1, who is the insurer of the tanker lorry. RW2 is the fire man. RW3 is the fire man of Karunagappilly fire station. RW4 deposed that the explosion was due to the spark from the police jeep when it was started, by the driver. Analysing the evidence of these witnesses, it is found that the accident was