dozens roadside bombs went off in a commercial district of U.S. , police said . Another bomb hit a minibus carrying laborers in eastern Falluja , officials said . Baghdad 's army will take over full responsibility for security when Iraq forces leave Thursday .
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 .