Iraqi officials are blaming two roadside bombs for killing at least seven people in an area where day laborers gather on the outskirts of Baghdad.

The officials say the blast went off near the town of Abu Ghraib Saturday. At least eight people were wounded. Officials said one of the blasts hit a truck carrying construction workers.

The latest violence underscores Iraq's security challenges after remaining U.S. troops leave the country by the end of this year.

On Thursday, three bombings in the southern Iraqi city of Basra killed 19 people and wounded at least 65 others.

There was no immediate claim of responsibility for the bombings, but officials said most of the victims were soldiers and policemen.

Violence across Iraq has declined significantly since peaking in 2006 and 2007, but attacks remain common. More than 250 people were reported killed last month.