24 May 2015. Iran has entered the fight to retake a major Iraqi oil refinery from Islamic State militants, contributing small numbers of troops – some operating artillery and other heavy weapons – in support of advancing Iraqi ground forces, US defence officials said.

THE GUARDIAN

http://www.theguardian.com/world/2015/may/23/iran-sends-troops

At industryabout.com: NRC - Baiji North Oil Refinery

NRC - Baiji Salahudin Oil Refinery

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