Updated On: 20 December, 2012 07:21 AM IST | | Agencies
Three workers in a polio eradication campaign were shot in Pakistan on Wednesday, and two of them were killed, the latest in a string of attacks that has partially halted the United Nations-backed global health campaign to stamp out the crippling disease.
Following the violence, the United Nations in Pakistan has pulled all staff involved in the immunisation campaign off the streets, spokesman Michael Coleman said.

Enough is enough: Pakistani polio vaccination workers shout slogans against the killing of their colleagues during a protest in Karachi yesterday. Pic/AFP