“I saw no point in cooperating with a country whose hands are dirty and intentions murky,” said Ayatollah.
US Secretary of State John Kerry ruled out any military coordination with Iran, which in the end was not invited to Paris.
"The air strike southwest of Baghdad was the first strike taken as part of our expanded efforts beyond protecting our own people," said US.
Building collapses are common in Nigeria because of the use of substandard material and flouting of construction regulations.
The pledge came as US Secretary of State John Kerry stepped up efforts to forge a broad anti-jihadist coalition.
U.S. Secretary of State John Kerry has been pressuring allies to show a united front to defeat the militants.
The purported executioner appears to be the same British-accented man who appeared in videos with Foley and Sotloff.
President Bashar al-Assad's regime has stepped up its air campaign against the jihadists in recent weeks.
The 400 air force personnel and 200 others in the contingent could be deployed this week, Abbott told reporters.
The schools will give psychological counseling and recreational activities to help the children transition to learning.
Sunni Muslim tribal figures have demanded a freeze on military action on civilian areas.
According to UN more than 1.8 million people have been displaced.
Hollande's visit to Baghdad is the French president's first visit to Iraq.
Finance Minister Amara Konneh told a news conference Thursday the country is at "war with an enemy we don't see."
Two activist groups said Tuesday's air raids struck the town of al-Bab in Aleppo province.
Syria's main Western-backed opposition group, meanwhile, welcomed President Barack Obama's authorization of U.S. airstrikes.
The 50-day Gaza war between Israel and Hamas-led militants ended on August 26 after killing more than 2,100 Palestinians.
Obama is still wrestling with a series of challenges, including how to train and equip a viable ground force to fight ISIS inside Syria.
The killing of three Israeli teens by Palestinians in the West Bank sparked a chain of events that led to the 50-day war.
Police officials said the two car bombs exploded simultaneously in the southeastern neighborhood of New Baghdad.
Nizar Ayyash of the Gaza Fishermen's Union says the incident occurred today off the northern Gaza town of Beit Lahiya.
An Ebola outbreak that began in Guinea has since spread to Liberia, Sierra Leone, Nigeria and Senegal, killing more than 2,000 people.
Barack Obama expressed his commitment to work with all communities in Iraq to fight against ISIS.
The attack took place near the town of Afgoye, some 30 kilometres northwest from the capital Mogadishu.
Israeli airstrikes have left much of the territory in ruins, and thousands of homes have been destroyed.
Their "clients" included Palestinians from the West Bank and foreign workers from Tel Aviv.
The bombing was followed by clashes with militants who tried to overtake the town.
ISIS has overrun large areas of Iraq and Syria and declared a cross-border Islamic caliphate.
The new cabinet, which is based in Ramallah, took office on June 2, with Gaza's Hamas govt officially stepping down same day.
The United Nations says at least 191,000 people have been killed in the more than three-year conflict.
Obama outlined plans at a NATO summit for a broad coalition to defeat the Islamic State jihadist group.
Last December, President Bashar al-Assad's regime launched a massive aerial campaign against rebel districts.
The IS popped up on the global radar in June by seizing assets in Iraq, but building on those early gains is proving difficult.
It is not the first time IS has carried out mass kidnappings in Iraq.
"We will be more forthright in the defense of our values," the leaders wrote.
The summit is organised by foundations representing: Tutu, Nelson Mandela, FW de Klerk and Albert Luthuli.