Latest: Iraq's prime minister 'arrives in Mosul to declare victory over Islamic State'

Iraqi forces are "tens of metres" from defeating the so-called 'Islamic State' group in Mosul, say commanders.

Update 3pm: Iraq's prime minister has arrived in Mosul to declare victory over the so-called 'Islamic State' group in the more than eight-month-old operation to drive the militants from the city, state TV said.

State TV quoted Haider al-Abadi as saying he "congratulates the fighters and the people on the big victory" in the key city.