Last week, the Kurdish peshmerga fighters launched the operation to retake Sinjar.
In Diyala province north of Baghdad, Army Colonel Faisal al-Zuhairi was killed when a suicide bomber in a Humvee attacked his convoy. Five of his men also died.
Shi'ites are commemorating the slaying of Prophet Mohammad's grandson Hussein at the battle of Kerbala in AD 680.
Islamic State is notorious for beheading or executing anyone who stands in its way when seizing cities and towns that form its self-proclaimed caliphate.
Coalition airstrikes in and around the city on Syria's border with Turkey have been augmented by an airdrop of arms to Kurdish forces fighting the terror group.
Islamic State said on Twitter that it downed the aircraft and published pictures that it claimed were of the debris and the corpse of one of the pilots.
The danger posed to Indonesia from IS was brought into focus last month when police arrested four ethnic Uighurs they allege were being taken to meet the country's most wanted militant to discuss recruitment for IS.
May said that only a minority of extremists are violent, but "the damage that extremists cause to our society is reason enough to act."
Police say the raids came after an eight-month investigation that began with a tip from the FBI. El Sabsabi is accused of giving about $12,000 to a US citizen to fund his travel to Syria.
The alliance carried out fresh raids against IS positions in Syria overnight, but the jihadists still managed to advance within five kilometres (three miles) of the strategic Syrian town of Ain al-Arab, known as Kobane to the Kurds, the Syrian Observatory for Human Rights said.
Obama said he had no choice but to order US air strikes on Assad's enemies, the Islamic State and the Khorasan Group because, he said, "those folks could kill Americans."
He made the remarks at a meeting with journalists on the sidelines of a gathering of world leaders at the United Nations General Assembly.
Britain and the United States have had tense relations with Iran since the 1979 Islamic revolution ousted the country's Western-oriented shah.
US, Saudi and Emirati warplanes bombed oil installations in eastern Syria overnight in a bid to cut off a significant source of funding for Islamic State.
al-Nuaimi was tried in a so-called "Sharia court" for apostasy, after which she was tortured for five days before the Islamic State sentenced her to public execution.
Asked about the 30,000 French citizens living in Algeria, Le Drian told RTL radio that the goal of the extremist groups is to "spread terror."
The president's remarks came against the backdrop of an expanded US military campaign against the Islamic State group, with airstrikes now hitting targets in both Iraq and Syria
The new group split away from al-Qaida's North Africa branch and declared allegiance to the al-Baghdadi's group in Iraq and Syria and has apparently adopted their tactic of killing hostages.
Speaking to the annual gathering of the United Nations General Assembly, Obama said the US would be a "respectful and constructive partner" in confronting the Islamic State militants through force.
US President Barack Obama, who hailed the strikes as a sign the world is united in confronting the jihadists, will be among the first leaders to address the General Assembly in New York.