Baghdad , Iraq ( CNN ) -- A series of deadly bombings claimed more than a dozen lives in Iraq Saturday , according to police and health officials . Seven people were killed and 28 others wounded when three roadside bombs exploded mid-morning in the busy Bab al-Sharji commercial district of central Baghdad , police officials said . Another six men died and 10 others were injured when a roadside bomb hit a minibus carrying young laborers and construction workers in al-Annaz area in eastern Falluja , health and police officials said . The blast occurred at about 5.30 a.m. local time in what is a predominately Sunni area . `` The victims were traveling every day in a minibus from Abu Ghraib to Falluja to work in a number of reconstruction sites , '' police officer Ahmed Salman told CNN . Meanwhile , the Iraqi army held a military parade in Falluja , sending hundreds of Iraqi soldiers accompanied by military vehicles through the main streets of the town Saturday morning , police told CNN . The military parade was part of preparations for the Iraqi army to take over full responsibility for security after U.S. troops leave Iraq on December 31 this year . Violence in Iraq has declined from its peak , but attacks around the country continue to cause deaths and injury . On Thursday , 19 people were killed and dozens others were hurt when three explosions hit a commercial district in Basra , an oil-rich , predominantly Shiite city about 500 kilometers ( 310 miles ) south of Baghdad .
Three roadside bombs went off in a commercial district of Baghdad , police said . Another bomb hit a minibus carrying laborers in eastern Falluja , officials said . Iraq 's army will take over full responsibility for security when U.S. forces leave next month .