Use "inflammable substance" in a sentence

1. (a) & (b) Yes, Government of India is aware of the tragic incident that took place in Brisbane, capital of Australian state of Queensland, on 28 October, 2016 when Shri Manmeet Sharma alias Alisher, a 29 years old Australian citizen of Indian origin hailing from Punjab, was killed by an unidentified assailant by throwing a highly inflammable substance, leading to his death from severe burns, while he was on duty driving a Brisbane city bus.

2. The tragic incident took place in Brisbane, capital of Australian state of Queensland, on 28 October, 2016 when Shri Manmeet Sharma alias Alisher, a 29 years old Australian citizen of Indian origin hailing from Punjab, was killed by an assailant, who apparently has a long history of mental illness, by throwing a highly inflammable substance, leading to his death from severe burns, while he was on duty driving a Brisbane city bus.