A suicide bomb and mortar attack by Islamic State militants killed 12 Shi’ite militia fighters north of Baghdad on Wednesday and a series of bombings in the Iraqi capital killed six people, military and medical sources said.

The militia fighters were killed when Islamic State militants commandeered an armored Humvee, rigged it with explosives and drove it into a school where the fighters were based near Dijla district, 20 km (15 miles) south of the city of Samarra.

They followed up with mortar and machine gun fire, a source at the Samarra Operations Command said, and clashes continued. […]