"... after the initial crackdown, the group began setting up services and institutions - stating clearly that it intended to stay and use the area as a base in its quest to eradicate national boundaries and establish an Islamic "state".
"We are a state," one emir, or commander, in the province told Reuters. "Things are great here because we are ruling based on God's law."
Some Sunni Muslims who worked for Assad's government stayed on after they pledged allegiance to the group.
"The civilians who do not have any political affiliations have adjusted to the presence of Islamic State, because people got tired and exhausted, and also, to be honest, because they are doing institutional work in Raqqa," one Raqqa resident opposed to Islamic State told Reuters.
Since then, the group "has restored and restructured all the institutions that are related to services," including a consumer protection office and the civil judiciary, the resident said." Reuters
"Foreign Minister Mohammad Javad Zarif said the threat from IS 'requires us to work together and seek common solutions.' It (Iran) has reached out to Saudi Arabia - the leading Sunni power and Iran's regional rival - and has turned a blind eye to US actions in Iraq, which it has historically opposed.
In Iraq, the Iranians themselves have played a key role in countering IS. Iranian Revolutionary Guards have advised Iraqi security forces, Iranian pilots have carried out air strikes, Iranian-backed Shia militia have mobilised, and Iran says it has been sending weapons and advisers to Iraqi Kurdistan.