Mourners and militiamen chant slogans against ISIS as they carry the flag-draped coffins of two members of the Peace Brigades, a Shiite militia group, during their funeral procession in south of Baghdad, Iraq, Saturday, Nov. 7, 2015.

A suicide bomber killed at least 12 people at a Shiite funeral in a mosque in the Iraqi capital on Friday, security and medical officials said.

The attack in the Al-Ashara al-Mubashareen mosque in the Amil area of south Baghdad also wounded at least 32 people, the officials said.

Two officials said the funeral was for a member of the volunteer paramilitary force known as the Popular Mobilisation units.

There was no immediate claim of responsibility for the attack, but suicide bombings are a tactic used exclusively by Sunni extremists in Iraq, including the Islamic State of Iraq and Syria (ISIS) jihadist group, who consider Shiites to be heretics.

The Popular Mobilisation units — which are dominated by Iranian-backed Shiite militias — are some of the most effective forces in the battle against ISIS, which overran large parts of the country last year.

Related articles across the web

• ISIS Marks First Day Of Eid By Blowing Up Mosque In Yemen, 25 Killed...
• Yemen IS branch says it's behind mosque blast that killed 25
• Suicide bombing at mosque kills at least 25 as they join holiday prayers
• Islamic State suicide bomber kills 25 at mosque in Yemeni capital
• IS suicide bomber kills 25 at mosque in Yemeni capital
• Yemen IS branch 'behind mosque blast that killed 25'
• At least 25 killed after blast at mosque in Yemen's capital during prayers
• Dozens dead after suicide bombing at mosque in Yemen's capital
• The destruction of the largest call center in Fallujah, killed 140 terrorists
• 17 terrorists killed in airstrike in Ramadi, says Media War Cell