Iraqi Prime Minister Haider al-Abadi's media office expressed surprise on Monday at comments by US Secretary of State Rex Tillerson's regarding Iranian-backed Iraqi Popular Mobilisation paramilitary units. 'No party has the right to interfere in Iraqi matters,' Abadi's media office said in a statement citing a source close to the prime minister. Tillerson said on Sunday it was time for Iranian-backed militias and their Iranian advisers who helped Iraq defeat Islamic State to 'go home'.