Allah must be pleased.

PESHAWAR, Pakistan — Gunmen killed a female polio worker and injured another near the northwest city of Peshawar on Tuesday, the latest in a series of assaults on vaccination teams working to eradicate the disease in Pakistan.

The women were vaccinating children in Kaga Wala, a village perched on the edge of the country’s volatile tribal belt, when two men opened fire, said Shafeeullah Khan, a local police official. One of the workers was critically injured in the attack and was being treated for gunshot wounds at a Peshawar hospital.

No one claimed responsibility for the assault, but last year the Pakistani Taliban denounced polio vaccination drives as a guise for U.S. spying activity. At least a dozen polio workers have been killed in Pakistan since mid-December.

Government officials have been assigning police to accompany polio vaccination teams. However, the attacks have continued, and several police deployed with vaccination crews have been killed and injured in militant assaults. Khan said the two workers attacked in Kaga Wala had been offered a police escort, but they declined.