QUETTA, Pakistan, Safar 4, 1436, Nov 26, 2014, SPA -- Gunmen attacked a polio vaccination team Wednesday, killing four health workers, AP cited officials as saying. The attack on the health workers took place in the southwestern city of Quetta. The vaccination team of three women and three men was waiting for a police escort when two gunmen opened fire on them, he said. Local militants oppose the vaccination campaign, alleging that western governments use it as a cover to spy on insurgents. --SPA 12:39 LOCAL TIME 09:39 GMT www.spa.gov.sa/w