Baghdad, Iraq (CNN) -- At least three people were killed and 40 injured Tuesday when three roadside bombs exploded in quick succession in an outdoor market in the town of Hamza, about 62 miles (100 kilometers) south of Baghdad, police officials said.
The attacks happened about 8:30 p.m., they said, declining to provide details.
Earlier Tuesday, nine people were wounded after three explosions hit Iraq's capital, Baghdad police said.
One police officer and three bystanders were injured in the first blast, caused by a bomb on a highway in eastern Baghdad. The bomb was targeting an Iraqi police patrol, police said.
Four people were wounded in another roadside bomb in central Baghdad, which police said targeted trash collectors who work for the city.
One person was wounded in a third explosion, caused by a sticky bomb attached to a civilian's car in a neighborhood in western Baghdad.
From CNN's Mohammed Tawfeeq.