The House of Representatives rejected an amendment to a defense bill on Thursday that would have forced lawmakers to vote on a formal authorization for the use of military force against Islamic State.
The United States is expected to announce on Wednesday plans for a new military base in Iraq's Anbar province and the deployment of around 400 additional U.S. trainers to help Iraqi forces in the fight against Islamic State, a U.S. official said.
Rebel fighters captured a major base from the Syrian army in the south of the country on Tuesday, rebels and a monitoring group said, a setback for President Bashar al-Assad reflecting the mounting pressure on him after recent losses elsewhere.
Israeli aircraft struck the Gaza Strip on Sunday after the latest in a series of Palestinian rocket attacks that Prime Minister Benjamin Netanyahu accused the international community of ignoring the Omar Brigades, a Palestinian group that supports Islamic State, claimed responsibility for Saturday's salvo, which, like the Israeli strike, caused no casualties.
The head of al Qaeda's Syria wing Nusra Front said he saw no solution soon to a conflict with the rival Islamic State group in Syria that has killed hundreds of fighters, according to an interview with Al Jazeera aired on Wednesday.
More than 10,000 Islamic State fighters have been killed since the international coalition started its campaign against the militant group nine months ago in Iraq and Syria, U.S. Deputy Secretary of State Antony Blinken said on Wednesday.
Western and Arab states carrying out air strikes on Islamic State fighters backed on Tuesday Iraq's plan to retake territory from the jihadist movement after being accused by the Iraqi premier of not doing enough to help Baghdad push back the insurgents.
The United States has accused the Syrian military of carrying out air strikes to help Islamic State fighters advance around the northern city of Aleppo, messages posted on the U.S. Embassy Syria official Twitter feed said.
Republican Jeb Bush, calling President Barack Obama's handling of the Islamic State a failure, said the United States should embed some U.S. troops with Iraqi forces to train them and identify targets.
Iraq's Shi'ite paramilitaries said on Tuesday they had taken charge of the campaign to drive Islamic State from the western province of Anbar, giving the operation an openly sectarian codename that could infuriate its Sunni population.
Hezbollah is fighting across all of Syria alongside the army of President Bashar al-Assad and is willing to increase its presence there when needed, the leader of the Lebanese Shi'ite movement said on Sunday.
Iraqi forces regained ground from Islamic State militants in western Iraq on Sunday, advancing towards the city of Ramadi one week after it fell to the insurgents.
Europe cannot halt the deadly traffic of African migrants across the Mediterranean unless it ends a boycott of forces that have seized power in the Libyan capital and helps authorities there cope, the de facto government in Tripoli said.
Shi'ite Muslim militiamen and Iraqi army forces launched a counter-offensive against Islamic State insurgents near Ramadi on Saturday, a militia spokesman said, aiming to reverse potentially devastating gains by the jihadi militants.
The FBI has arrested two men in southern California, one at Los Angeles International Airport, suspected of attempting to travel abroad to join Islamic State, NBC News reported on Thursday.
A suicide bomber blew himself up at a Shi'ite mosque in eastern Saudi Arabia during Friday prayers, residents said, and up to 30 people were reported to have been killed or wounded.
Islamic State seized full control of the historic city of Palmyra in central Syria on Thursday, just days after it captured a provincial capital in neighboring Iraq, suggesting momentum is building for the ultra-hardline group.
Iraqi forces said they fought off an overnight attack by Islamic State militants near the city of Ramadi, which the insurgents overran at the weekend in the most significant setback for the government in a year.
Sweden has asked Turkey for help finding three Swedish nationals it believes are trying to join Islamic State militants in Syria despite twice being intercepted and deported from Turkey, senior Turkish officials said on Tuesday.
Islamic State fighters who overran Ramadi in a major defeat for the Iraqi government and its Western backers tightened their grip on the city, flying back flags on key buildings and setting free prisoners in a drive to win the support of local residents.
A top aide to Iran's leader met Syrian President Bashar al-Assad on Tuesday, footage on Syrian state television showed, underlining firm Iranian support for Damascus as it faces mounting pressure from insurgents in a four-year-old civil war.