A string of attacks today against Shiite pilgrims in eastern Baghdad killed five, the latest round of violence to strike worshippers during a revered mourning observance. Insurgents have targeted Shiite pilgrims, killing dozens and wounding more than 100 this week in an attempt to re-ignite sectarian violence.<br/> <br/>The attacks began on Sunday morning when a bomb was planted near a tent that offered drinks and food to pilgrims, a police official said. The blast killed three and injured 16, he said.<br/><br/>Hours later, a bomb exploded near a line of minibuses parked in eastern Baghdad that were carrying pilgrims to the holy city of Karbala, killing two people and injuring seven, said police and medical officials.<br/> <br/>In a separate incident minutes later, an attacker hurled a hand grenade into another tent full of pilgrims in another part of eastern Baghdad, injuring six, said a police official.<br/>