QUETTA, Pakistan (AP) -- A government official says a bomb has struck a pair of buses carrying Shiite Muslim pilgrims in southwest Pakistan, killing four people.
Zubair Ahmed said the attack Sunday in Baluchistan province's Mastung district wounded another 15 people, including three women. The bomb was strapped to a motorcycle and detonated by remote control. One bus was almost completely destroyed. The other was damaged.
Ahmed said the buses were coming from neighboring Iran, a majority Shiite country and popular destination for religious pilgrims.
Pakistan has experienced a spike in killings over the last year by radical Sunni Muslims targeting Shiites who they consider heretics. Many attacks have occurred in Baluchistan, believed to be a hiding place for senior Afghan Taliban commanders and also the site of a decades-long insurgency by nationalists.