NEW : Car bomb kills 5 in Basra . Blasts occur in Shiite areas of Baghdad and Najaf . Iran 's Fars News Agency said that on any given day , about 1,500 pilgrims travel from neighboring Iran to visit Shiite shrines in Iraq , particularly in Najaf and Karbala . Many of the victims are Iranian pilgrims , an official said . And in Baghdad , a bomb wounds 10 people .
NEW : Car bomb kills 5 in Basra . Blasts occur in Shiite areas of Baghdad and Najaf . Many of the victims are Iranian pilgrims , an official said . And in Baghdad , a bomb wounds 10 people .