Iraqi officials have said the large explosion at a military base belonging to the pro-Iran Hashd al-Shaabi forces was caused by stored ammunition.
![Clashes have recently taken place between IS militants and PMF fighters near Samarra [Getty File Image]](/sites/default/files/styles/image_156x88/public/2021-10/GettyImages-513701490.jpg?h=cb5853cd&itok=snI_u78K)
![Iraq's powerful Popular Mobilisation Forces militia are backed by Iran [Getty]](/sites/default/files/styles/image_156x88/public/2021-05/GettyImages-1233118288.jpg?h=199d8c1f&itok=u9FhRxPg)
