KIRKUK, Iraq, Sept. 9 (Xinhua) -- At least seven people were killed and some 50 others wounded when a car bomb and a roadside bomb were detonated coordinately in the city of Kirkuk in northern Iraq on Sunday, a local police source told Xinhua.
The attack occurred before midday when a car bomb went off near Kirkuk University and a marketplace in central Kirkuk, some 250 km north of Baghdad, the source said on condition of anonymity.
Minutes later, another roadside bomb was detonated at the scene of the first blast, the source said, adding that a total of seven people were killed and some 50 others wounded by the blasts.
The powerful blasts destroyed several nearby civilian cars and caused damages to nearby buildings and shops, he said.
The explosions are seen as part of a series of bomb attacks that hit the Iraqi cities on Sunday and killed 28 people and wounded dozens of others.
Violence in Iraq has ebbed from its climax in 2006 and 2007, when sectarian conflicts pushed the country to the brink of a civil war, but tensions and attacks remain common across the country.