Three bombings in the southern Iraqi city of Basra have killed 19 people and wounded at least 65 others.

Iraqi security officials and medical officials said Thursday the first two bombs, on motorcycles, exploded simultaneously in a busy market located in the city's center. A third blast went off as Iraqi army authorities and police arrived at the scene.

The officials said most of the casualties were soldiers and policemen.

There was no immediate claim of responsibility for the bombings.

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.

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