Baghdad: Iraq’s most important Shiite religious leader Grand Ayatollah Ali Al Sistani endorsed international intervention against the Islamic State of Iraq and the Levant in his country on Friday, following US and French air strikes, but called for strict guidelines.

“Even if Iraq is in need of help from its brothers and friends in fighting black terrorism, maintaining the sovereignty and independence of its decisions is of the highest importance,” Sistani’s spokesman Shaikh Abdul Mahdi Karbala’i said during a Friday sermon.

Al Sistani speaks for millions of Iraqis and has a worldwide following.

Meanwhile, a series of car bombings targeting a Shiite mosque and markets in the Iraqi capital killed at least 20 people on Friday, officials said, in the second straight day of attacks in Baghdad blamed on Islamist militants who have seized large parts of the country.

In the day’s deadliest attack, a parked explosives-packed car detonated near the Al Mubarak mosque in central Baghdad’s mostly Shiite district of Karradah, killing eight people and wounding 18 others, police said.

Cars later exploded in two outdoor markets, one in the Shiite suburb of Nahrawan and the other in the Shiite district of Bayaa. The attacks together killed nine people and wounded 23, according to police. Just south of Baghdad, yet another car bomb went off on a parking lot in Mahmoudiyah town, killing three and wounding 10, said police.

Medical officials confirmed the casualty tolls. All officials spoke on condition of anonymity because they were not authorised to brief the media.

Friday’s attacks came a day after a series of deadly attacks in mainly Shiite areas in and around Baghdad that left dozens killed.

The coordinated nature and style of the attacks strongly suggested they were the work of the extremist Isil group. It considers Shiites heretics and has captured large chunks of territory in western and northern Iraq, plunging the country into its worst crisis since US troops left at the end of 2011. US warplanes have been carrying out airstrikes against the group as Iraqi and Kurdish security forces work to retake territory it has seized.

US Central Command said on Thursday that the military has carried out 176 airstrikes in Iraq since August 8.