The claim: The Islamic Black Flag raised in Iran signifies a call to war. An Oct. 17 Facebook post (direct link, archive link) shows a picture of the golden dome of the Imam Reza shrine in Iran ...

CLAIM: A major mosque in Iran raised a black flag to call Muslims to war over Israel’s attacks on Gaza. THE FACTS: The Imam Reza shrine said the flag was raised as a symbol of mourning for the lives ...

"The Islamic Black Flag has been risen on Razavi Shrine in Mashhad, Khorasan province, Iran, shown below," read the caption of an Oct. 17 Facebook post.