BAGHDAD, Iraq (AP) _ A Shiite baker was killed in a drive-by shooting as he headed to work in Baghdad on Friday, while the bullet-ridden bodies of two other Iraqis were found in the capital.

The killings occurred in two areas of Baghdad with mixed populations of majority Shiites and minority Sunni Arabs, and appeared to be part of the rising sectarian violence in Iraq.

The baker, Nadil Adel Ashor, was killed outside his home by unidentified gunmen in a speeding car in Dora, southern Baghdad, said police 1st Lt. Maitham Abdul-Razzaq. On Thursday, armed men broke into another bakery in Dora and killed two Shiite workers.

The two bullet-riddled bodies were found in Dora and in Mansour, western Baghdad, said police 1st Lt. Thair Mahmod. He said the identities of the victims and the motives for the killings were not immediately known.

A roadside bomb aimed at a U.S. military patrol exploded Friday morning in Dora, missing its target but wounding two Iraqi civilians who were driving nearby, said Abdul-Razzaq. A U.S. Army official confirmed that the attack had missed the American soldiers.

Three Iraqi policemen also were wounded by a roadside bomb that hit their patrol Friday in Baghdad's western neighborhood of Yarmouk, said Abdul-Razzaq. When police and witnesses rushed to the scene, a second bomb exploded, an AP photographer said.

A roadside bomb also hit a passing Iraqi police patrol in Qadissiya, southwestern Baghdad, wounding six officers, said Abdul-Razzaq.

Sectarian tensions have been running high in Iraq since the Feb. 22 bombing of a Shiite shrine in Samarra, 60 miles north of Baghdad, and the reprisal attacks against Sunni mosques and clerics that followed.