The Islamic State jihadist group has claimed responsibility for two car bomb attacks against Shiites in Baghdad, with Iraq under tight security Monday ahead of the annual Ashura commemorations.

A statement by IS posted on jihadist websites said “the heroes of Islam” detonated one car bomb in central Baghdad targeting Shiite security personnel and the other in the Shiite-majority Sadr City ara in the capital’s north.

The two Sunday bombings killed at least 18 people and wounded dozens more, security and medical officials said. […]