Police escort health workers as they administer polio vaccines to children in Karachi, Pakistan.
Three police officers were wounded in an attack by gunmen on May 25 on a polio vaccination team in Pakistan's Khyber Pakhtunkhwa Province that borders Afghanistan, officials told RFE/RL's Radio Mashaal. The police officers were guarding the vaccination team when the attack took place in Mir Dara district of the province, local police spokesman Zaheer Afridi told Radio Mashaal. The attackers managed to escape, Afridi added. Pakistan and neighboring Afghanistan are the only countries in the world where the polio virus still exists. Militant groups often attack polio vaccination teams and police officers assigned to protect them. To read the original story by RFE/RL's Radio Mashaal, click here .