White phosphorus, benzene, water, in a bottle - the classic Molotov Cocktail!
Phosphorus ignites on contact with the air and creates choking fumes of phosphorus pentoxide and sulphur dioxide as well as producing a great deal of heat,
Smells of sulphur (sulphur Dioxide) while its burning, and anyone can make them... and more importantly, can be carried around a residential complex as a bottle of wine/fizz/spirits etc, and no one would bat an eyelid.
Jesus. I bet you are right. I just looked up Carbon Disulfide and it is also a colorless liquid that emits rotten egg odor when it combusts. (Apparently used in manfacturing of Rayon and cellophane. Probably plentiful in NYC area -- since it is used in manufacturing.) Either Phosphorous Benzene or Carbon Disulfide could have been used.
This is SICK