PakistanPoliceman killed, another critically injured as fire opened on Mardan polio squadNoman FidaApril 10, 2013April 12, 2013 by Noman FidaApril 10, 2013April 12, 2013 PESHAWAR: A police official was killed while another critically wounded as they were attacked by armed assailants in Mardan, here on Wednesday (today)....