Officials say a wave of attacks in and around Baghdad has killed at least 11 civilians and wounded 28.

The attacks targeted five commercial areas with bombs. Police officials said the deadliest bombing Thursday killed three shoppers and wounded 10 in the town of Tarmiyah, 50 kilometers (30 miles) north of Baghdad.

They added that other four attacks in Baghdad killed eight civilians and wounded 18 in total.

Hospital officials corroborated the casualties. Officials spoke on condition of anonymity because they were not authorized to talk to reporters.

No one immediately claimed responsibility for the attacks. However, the Islamic State militant group is often behind assaults on security forces and public areas as it seeks to challenge Iraq's Shiite-led government amid intensifying battles in northern and western Iraq.