Baghdad ? A car bomb ripped through a crowd of Shiite pilgrims outside the holy city of Karbala Friday, sending many fleeing into the path of a suicide attacker who detonated a second bomb in coordinated blasts that killed at least 40 people and wounded 150.

The twin bombing came on the final day of an annual Shiite religious observance, which has been the target of three large-scale attacks in Iraq this week alone. In Pakistan, two bombs targeting Shiites observing the same holy day Friday killed at least 25 people and wounded around 100 more.