Australian Prime Minister Tony Abbott on Tuesday said "extreme force" was justified in battling Islamic State militants, as UN Secretary General Ban Ki-moon called the extremists` reign of terror "totally unacceptable".
Prime Minister David Cameron on Monday announced tougher anti-terror measures against British-born extremists planning to fight in Iraq and Syria, and prohibit them from returning to the UK to launch attacks on home soil.
US President Barack Obama on Monday notified the Congress about his authorisation for conducting targeted airstrikes and humanitarian assistance to help Iraqis threatened by Islamic State (IS) militants.
Heavy fighting erupted on Monday between the Syrian army and Islamist rebels on the Golan Heights, where 44 peacekeepers from Fiji are being held by militants and scores of their fellow blue helmets from the Philippines escaped after resisting capture.
Heavy fighting between Syrian army forces and rebels erupted on the Golan Heights on Monday, a Reuters photographer said, but it was unclear if either of the two sides had gained an advantage to control a key frontier crossing.