More attacks on polio workers in Pakistan

Armed men have killed three more people working on a polio vaccination campaign in Pakistan, officials said, as the nationwide drive against the crippling disease suffered a third day of bloodshed.
A female health worker and her driver were shot dead in Charsadda, near Peshawar, the main town of northwest Pakistan, police official Wajid Khan told AFP news agency on Wednesday. A second police officer confirmed the incident.
Another worker shot and critically wounded in an earlier attack on the outskirts of Peshawar also died, doctor Ahmad Saqlain of the city's Lady Reading Hospital said.
Al Jazeera's Imtiaz Tyab reports from Islamabad.