Bombs exploded at a bus station and a small market in Baghdad, killing 15 people Tuesday in an increase in bloodshed in the capital after a week of relative calm, police and hospital officials said.
U.S. officials say attacks in Baghdad average about four a day — down nearly 90 percent from levels of late 2006, when Shiite-Sunni fighting was at its high point and just before the U.S. troop surge that helped bring down violence.
Tuesday's blasts came a day after a series of bombings killed 10 people and wounded 40 more, underscoring the threat still posed by extremists.
Other attacks also took place in Mosul, where violence has spiked in recent months.
In Baghdad, a bomb hidden under a car blew up at a bus depot in the predominantly Shiite neighborhood of Mashtal on the east side, killing 11 people, including two women. Twenty-one were wounded, authorities said.
In the northern Shiite-dominated district of Qahira, four people were killed and eight injured when a roadside bomb exploded near a market, police said.
Also Tuesday, one person died when a roadside bomb in central Baghdad targeted the convoy of a Shiite government official and former member of the Iraqi Governing Council.