BAGHDAD — Attacks on a bus stop, a police patrol, and a convoy carrying the head of a university killed eight people and wounded 20 others in Iraq Thursday, authorities said.

A car with explosives blew up near a bus stop in the mainly Shi’ite neighborhood of Hurriyah in Baghdad. Five people were killed and 15 ­others were wounded.

There was no immediate claim of responsibility. Attacks against Shi’ites are typically the work of Sunni extremists.

Also Thursday, a roadside bomb hit the convoy of Fadhil al-Dulaimi, head of Diyala University, in Baqouba. Two bodyguards died . Dulaimi was not hurt.

Hours later, a roadside bomb struck a police patrol in southeastern Baghdad, killing one civilian bystander and wounding three policemen.