At the same time, several media outlets report pro-Iranian protesters have gathered outside the Green Zone in the Iraqi capital Baghdad, where major Iraqi government buildings and the US embassy are located.
Tried to storm roadblocks
Hundreds of activists are said to have tried to storm barriers around the Green Zone early Sunday morning - following Iran's confirmation that Supreme Leader Ali Khamenei had been killed, AFP reports, citing a security source.
The attempts have so far been thwarted, but they continue to try, the source says.
Videos on social media show activists throwing rocks at security forces, who fire tear gas. There have also been images posted on social media of protesters claiming to be outside the US embassy.
Other images show protesters outside the Green Zone holding up portraits of Ali Khamenei and waving Iranian flags.
Protests in other Iraqi cities
An AFP journalist on site also said he had seen flags with symbols used by armed pro-Iranian groups in Iraq among the activists.
According to the Financial Times, pictures have also been published on social media of similar protests in Iraqi cities such as Nasiriya and Basra.
Nine provinces in the southern and central parts of Iraq - which are dominated by Shiite Muslim populations - have declared a holiday to honor the memory of the slain Ali Khamenei.
