After mass bombing by aircraft of the US-led coalition paved the way for ground troops yesterday, Iraq's Kurdish peshmerga retook several villages and closed in on the Sinjar area.
The anti-IS war's top commander, US Lieutenant General James Terry, said today that 50 air strikes had allowed the Kurds to "regain approximately 100 square kilometres of ground".
IS captured Sinjar in early August, and preventing a genocide against its largely Yazidi minority was a reason US President Barack Obama put forward for launching the air war against the jihadists.
"At around 7:00 am (0400 GMT), there were coalition strikes on Nahyat al-Ayadhiya," Brahim told AFP. "A large deployment of peshmerga is ready to close in on Sinjar."
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An AFP reporter saw the mangled bodies of IS fighters killed by the air strikes and which peshmerga fighters covered with sand to reduce the stench.
Kurdish forces used heavy artillery to pound IS positions in the area but officials said the fighting was less intense than yesterday.
The US military command supervising the coalition air campaign said yesterday that 61 air strikes had been carried out in Iraq since Monday.
That was some of the heaviest bombardment since the jihadist onslaught on the Sinjar area and towards Iraq's autonomous Kurdish region prompted the first US air raids four months ago.