"I have not seen my son since November 2013 but that is not my son," Muthana said.
Seventeen strikes near the Syrian border town of Kobani also destroyed 10 fighting positions, a building and several vehicles in addition to striking the militant units, a statement said.
Islamic State commanders are liable for war crimes on a "massive scale" in northeast Syria, the UN said.
The general's remarks could stir political concern just days after Obama authorized expanding the number of U.S. troops in Iraq to as many as 3,100 from a current limit of 1,600.
President Obama authorized the U.S. military to deploy up to 1,500 additional troops to help train and advise Iraqi and Kurdish forces fighting Islamic State militants
The British journalist stands in front of a suspicious looking backdrop, claiming to be reporting from the Kurdish city of Kobane
Kurdish forces, helped by coalition airstrikes, took back a northern Iraqi town and several villages on Saturday
After weeks of resistance from tribal defenders, the village of Zauiyat albu Nimr fell.
Twenty-six other bundles of supplies were dropped to Kurds in the besieged city and reached their targets, the Pentagon said.
The main aim is to generate fear in Islamic State's ranks, said the head of "White Shroud" - a group that says it has killed more than 100 Islamic State fighters
"Of 1,730 identifiable new and expended small-arms cartridges, CAR identified the markings of manufacturers in 21 different countries all over the world," writes Kyle Murao
If Islamic State seizes full control of the city—which U.S. officials acknowledge is possible in coming days—it would be able to boast that it has withstood American air power
The Obama administration has made several U-turns in Syria policy, all to keep the U.S. out. With the rise of the Islamic State, that's proved impossible.
Despite U.S. pressure, Turkey has so far refused to play a more active role in saving the town
No sooner has the war with Hamas ended than Israel is threatened from its northern borders.
Across the frontier, U.S.-led air strikes appeared to have pushed Islamic State fighters back to the edges of the Syrian Kurdish border town of Kobani
Allied strikes have destroyed 59 U.S.-built Humvees seized by the Islamic State group from Iraqi forces, Central Command reported
Local sources inside Kobani confirmed that the group, formerly known as ISIL, had planted its flag, but said Kurdish forces had repelled its advances so far
Has Turkey joined the anti-ISIS coalition to counter the Kurds?
A Facebook page for Jordan Matson says he attended Case High School in Racine, Wisconsin.
Washington wants Lebanon to stop ISIS at its borders. So does Hezbollah. It's a tricky minuet for two longtime lethal foes.
"For Syria to remain unified, it is not possible that Assad presides over that entire process," Obama said in his interview
On Friday, all three nations approved airstrikes and commited fighter planes in the struggle against the militant group
Islamic State militants are ditching conspicuous convoys in favor of motorcycles and planting their black flags on civilian homes
The masked Islamic State militant in the videos depicting the beheading of two Americans has been identified, FBI Director James Comey said on Thursday
Iraqi Prime Minister Haider al-Abadi said Iraq had received "credible" intelligence that Islamic State militants plan to attack subway systems in Paris and the United States.