The United States is fast-tracking deliveries of military hardware, including drones and missiles, to Iraq, a Pentagon spokesperson said in a statement.
The US promise comes after al Qaeda-linked militants took over parts of Ramadi and Falluja, strategic cities on the Euphrates River.
The US ruled out sending American troops to Iraq, two years after Washington ended nearly a decade of occupation.
More top news
Cloudy skies for many this Bank Holiday Sunday.
The brother of British holidaymaker Steven Cook who vanished in Crete 10 years ago has his family are "sure he's alive".
Neurologist and Author Dr. Oliver Sacks CBE who wrote popular case histories like “The Man Who Mistook His Wife for a Hat” has died aged 82.