"Highly dangerous" radioactive material has been stolen from an oil depot in Iraq, with officials fearing it could be used by IS.
The material, stored in a protective case the size of a laptop computer, went missing in November from a storage facility near the southern city of Basra.
The facility belonged to US oilfield services company Weatherford, according to a document obtained by Reuters.
The material, Iridium-192, employs gamma rays to test for flaws in oil and gas pipelines in a process called industrial gamma radiography and is the same as that stolen from a van in Lancashire in February 2013.
At the time, a spokesman for the UK's Health Protection Agency (HPA), said: "If the material is outside of its protection packaging, anyone who has come into prolonged physical contact, such as keeping it in a pocket, should seek medical assistance."
A senior environment ministry official based in Basra told Reuters up to 10g (0.35 ounces) of Ir-192 "capsules" was taken.
The material is classed as a Category 2 radioactive source by the International Atomic Energy Agency and can be fatal if someone is exposed for a period of hours to days.
