An Iraqi paramilitary force says it has seized a key road west of Mosul, effectively encircling the city controlled by so-called Islamic State, the BBC reports.
The Popular Mobilisation (Hashd al-Shaabi) declared it had taken control of the road between Tal Afar and Sinjar after linking up with Kurdish forces.
IS militants still control the section of the road between Tal Afar and Mosul.
Meanwhile, an air strike reportedly hit another bridge in Mosul, as troops advanced further into eastern areas.
There is now only one functioning bridge left spanning the River Tigris, which flows through the city.
About 50,000 Iraqi security forces personnel, Kurdish fighters, Sunni Arab tribesmen and Shia militiamen are involved in the five-week-old offensive to drive IS militants out of their last major urban stronghold in the country.