Islamic State militants have used chlorine gas as a weapon and are recruiting highly trained technicians in a serious bid to develop deadlier chemical weapons, Australia's Foreign Minister Julie Bishop warned.
Bishop said the rise of militant groups such as ISIS, also known as the Arabic name Daesh, posed "one of the gravest security threats we face today."
"Apart from some crude and small scale endeavours, the conventional wisdom has been that the terrorist intention to acquire and weaponise chemical agents has been largely aspirational," Bishop told a meeting of the Australia Group in Perth.
The speech on Friday was posted online.
"The use of chlorine by Daesh, and its recruitment of highly technically trained professionals, including from the West, have revealed far more serious efforts in chemical weapons development," she said.