The accord could help to boost unity in the fight against the Islamic State.
Tehran has also been flying unarmed surveillance aircraft in the skies over its neighbor and ally, the official said.
Iraq is paying salaries to tens of thousands of soldiers who don’t exist, the prime minister said on Sunday.
Efforts to build a resistance to the Islamic State are hit by corruption and mistrust — and mass killings.
The tribesmen had fought the militant group in the western city of Hit before it fell to the extremists.
Iraq retook Jurf al-Sakhar from jihadists — by pouring in thousands of fighters and virtually destroying it.
The Iraqi government claimed to have retaken the flash point town of Jurf al-Sakhar from Islamic State militants.
The assault, which hospitalized 11 police officers, appears to be the group’s first confirmed use of chemical weapons.
Trapped Yazidi fighters pleaded for airstrikes as militants began their push under the cover of bad weather.
The appointment of an associate of the Badr militia may harm efforts to unite Shiites and Sunnis.