Muslim clerics of both the Shi'ite and Sunni sects from about 80 countries gathered in Qom, Iran today (Sunday) in order to work on a strategy to combat extremists, including the "Islamic State" terror group that has captured large parts of Iraq and Syria.

Iran, which has a Shi'ite majority, has been helping Iraqi, Syrian and Kurdish forces battle the Sunni extremist group on the ground while the US.-led coalition has been conducting airstrikes.