
Reuters
A bus is seen in flames at the site of a bomb explosion in Karachi, Pakistan, Dec. 29. Six people were killed and 48 wounded, police and a hospital official said.

Shakil Adil / AP
A Pakistani woman grieves after losing her son in the blast.
Pakistan's commercial capital and biggest city has seen numerous militant attacks over the past 10 years and is also plagued by violence between rival ethnic-based factions.
-- Reported by Reuters

Reuters
People carry an injured man away from the scene of a bomb explosion.

Akhtar Soomro / Reuters
Firefighters douse a bus after a bomb explosion in Karachi.