The majority of protesters who took to Iranian streets against Mullahs are Shiites, informed sources told the Baghdad Post on Sunday.
The sources confirmed that the Sunnis made the least number among protesters.
The protests that erupted Thursday mainly opposed the economic
problems in the country, but it then turned political.
At least 11 protesters were killed, and hundreds were injured, most of them seriously.
Earlier in the day, Iran restricted access to several social media apps and warned that anti-government protesters who cause public disorder will "pay the price" after three days of demonstrations across the country.
Instagram and Telegram have been temporarily "restricted" in order to ensure calm and security, state-run media outlet IRIB reported Sunday.
Social media has been vital resource for Iranians participating in the protests -- described as the largest public display of discontent since the 2009 Green Movement in Iran.
While independent media coverage from inside the country has been limited, protesters have used apps like Telegram, which offers public channels for users in addition to encrypted messaging, to share information and videos of protests and clashes. Official media outlets have provided few details about the protests.