[ImJustAnotherOkie]

Sounds like the gas was used to immobilize then a bomb used to blow them up.

Chlorine gas is nasty stuff. If you have a pool and mix powder with water it can explode if you have mix 2 incompatible granular bases. Sent me to the ER.

It happens a lot when people try to shock a pool through the tablet dispensers.

[GonzoII]

"Chlorine gas is nasty stuff. If you have a pool and mix powder with water it can explode "

From September 16, 2014

14 IS militants killed as their rocket explodes

[crazydad]

I think Chlorine gas was one of the first used during World War 1? I may be mistaken but it is nasty stuff.