Iraq's Prime Minister Haider al-Abadi announced the airstrikes in a statement, saying the air force hit the border towns of Boukamal and Husseibah, strikes that came in response to recent bombings in Baghdad claimed by IS and linked to the militants' operations in Syria.
Meanwhile, Iraqi forces pushed into the first neighborhood of western Mosul and took full control of Mosul's international airport and a sprawling military base on the southwestern edge of the city, according to Iraqi officials.
The territorial gains marked the first key moves in the battle, now in its sixth day, to rout IS militants from the western half of Mosul, Iraq's second-largest city.
The push into the Mamun neighbourhood was followed by intense clashes with IS militants, according to an Iraqi special forces officer on the ground, who spoke on condition of anonymity in line with regulations.
More From This Section
Similarly intense counterattacks followed pushes on the other fronts. Federal police Maj. Gen. Haider al-Maturi said his forces pushed through concrete roadblocks and earthen berms set up by the Islamic State group to impede their progress, and succeeded in capturing around 30 per cent of the Aviation District, the first district entering Mosul's western perimeter from the south.
Al-Maturi said six Iraqi troops were wounded, including two officers. However, an Associated Press team near the front line saw at least four wounded special forces' members and the bodies of three soldiers, suggesting more intense fighting than the previous day.
A Canadian medic volunteering at a front-line clinic said he had treated at least 10 wounded federal policemen. Iraq's military does not release official casualty figures.
Earlier today, the spokesman of the Joint Military Operation Command, Brig. Gen. Yahya Rasool, said Iraqi forces had also retaken the military base adjacent to the airport.
The advances came a day after special forces joined the fight for western Mosul.