Security officers guard near a damaged paramilitary force's vehicle at the blast site in southwest Pakistan's Quetta on Nov. 13, 2012. At least two people were killed and about nine others injured when a roadside planted bomb hit a paramilitary force's vehicle in Quetta Tuesday afternoon, local media reported. (Xinhua Photo/Iqbal Hussain)

A security officer inspects a damaged paramilitary force's vehicle at the blast site in southwest Pakistan's Quetta on Nov. 13, 2012. At least two people were killed and about nine others injured when a roadside planted bomb hit a paramilitary force's vehicle in Quetta Tuesday afternoon, local media reported. (Xinhua Photo/Iqbal Hussain)

Damaged vehicles are seen at the blast site in southwest Pakistan's Quetta on Nov. 13, 2012. At least two people were killed and about nine others injured when a roadside planted bomb hit a paramilitary force's vehicle in Quetta Tuesday afternoon, local media reported. (Xinhua Photo/Iqbal Hussain)

Security officers inspect a damaged paramilitary force's vehicle at the blast site in southwest Pakistan's Quetta on Nov. 13, 2012. At least two people were killed and about nine others injured when a roadside planted bomb hit a paramilitary force's vehicle in Quetta Tuesday afternoon, local media reported. (Xinhua Photo/Iqbal Hussain)