The attack is part of a recent spike in violence against Shiite pilgrims . Authorities have stepped up security to help protect the pilgrims . Security has been increased around the shrines , especially in Karbala where the governor expects around two million pilgrims this year from Iraq and other countries . TL;DR A suicide bomber blew himself up at an Iraqi shrine on Sunday, killing more than 100 people and wounding hundreds more, officials said.
The attack is part of a recent spike in violence against Shiite pilgrims . Authorities have stepped up security to help protect the pilgrims . TL;DR A suicide bomber blew himself up at an Iraqi shrine on Sunday, killing more than 100 people and wounding hundreds more, officials said.