Blast in Southwestern Pakistan Wounds 13

Residents stand among rubble and debris at the site of a bomb attack in Quetta, Pakistan, April 24, 2013.

Rescue workers move a wounded man after a bomb attack in Quetta, Pakistan, April 24, 2013.

A security official shows a grenade found at the site of a bomb attack in Quetta, Pakistan, April 24, 2013.

A shopkeeper sits outside his shop, after it was damaged by a bomb attack in Quetta, Pakistan, April 24, 2013.