BAGHDAD: Three separate attacks in Shiite-dominated areas on Sunday in central Iraq have killed at least four people and wounded 14, officials said.

The deadliest was in the Husseiniya area northeast of Baghdad, where three roadside bombs went off simultaneously, killing three civilians, a police officer said. He said 11 others, including three policemen, were wounded.

Another police officer said a soldier was killed when a bomb attached to his car exploded in the northern Utaifiya neighborhood of Baghdad.

Two health officials confirmed the causality figures. All officials spoke on condition of anonymity as they were not authorized to release information to reporters.

In Karbala, 90 kilometers (55 miles) south of Baghdad, a suicide bomber set off his explosives-laden belt near the two revered Shiite shrines and wounded three people, Gov. Amal-Din al-Hir said.

Violence has ebbed across Iraq in recent years, but insurgents frequently attack security forces and civilians in an attempt to undermine the country's Shiite-led government.