The protestors were supporters of prominent Iraqi Shiite Ayatollah Mahmoud al-Hassani, an outspoken critic of Iranian meddling in Iraq, the daily Sharq reported on Monday.
They protested against a program aired on Irans state-run satellite channel al-Kowthar against Ayatollah al-Hassani.
Iran has at least seven Arabic-language television stations and more than two dozens journals spreading its propaganda in Iraq.