PESHAWAR, Pakistan -- Police say one policeman was killed when armed men opened fire on police officers protecting a team of polio-vaccination workers in northwest Pakistan on November 30.
The attack happened near the city of Peshawar. Another policeman was injured.
The assailants fled after the attack.
No one has claimed responsibility, but Taliban militants have killed more than a dozen polio workers and police protecting them over the past year in Pakistan. They accuse health workers of acting as spies for Washington and claim the vaccine is intended to make Muslim children sterile.
Pakistan is one of only three countries in the world where polio is still endemic.
With reporting by AP