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Photos of the day - October 7, 2013

A Pakistani health worker gives a polio vaccine to a child in Rawalpindi, Pakistan, Monday, Oct. 7, 2013. A bomb exploded in Peshawar next to a van carrying Pakistani security guards tasked with protecting workers involved in an anti-polio drive in the countrys northwest on Monday, killing several people, according to officials. (AP Photo/B.K. Bangash)

Blast near Peshawar vaccination center

A bomb that exploded near a polio vaccination team in the volatile northwestern Pakistani city of Peshawar on Monday killed at least two people, and possibly as many as six, police said, the latest in a string of attacks against health workers.

Islamist violence has been on the rise in Pakistan, undermining Prime Minister Nawaz Sharif's efforts to tame the insurgency by opening peace talks with the Taliban. (Reuters)