Islamic State group extremists lined up and shot dead at least 50 Iraqi tribesmen, women and children Sunday, officials said, the latest mass slaying by militants who have killed some 150 members of the tribe in recent days.

Iraqi lawmakers approved Prime Minister Haider al-Abadi’s remaining Cabinet nominees on Saturday, including for the critical defense and interior portfolios, completing the formation of a government that will strive to push the Islamic State extremist group out of the sprawling territory it has seized in recent months.

A series of car bomb attacks in Iraq’s capital killed 38 people in Shiite areas Saturday, authorities said, after Islamic militants killed a journalist working for a local television network in a Sunni province.