ISLAMABAD, June 28 (Xinhua) -- Two policemen and a polio worker were killed in an attack in Pakistan's northwest Khyber Pakhtunkhwa province on Tuesday, police sources said.
A polio team escorted by police was administering polio vaccines to kids in North Waziristan district when they came under attack, the sources told Xinhua.
"Unknown gunmen opened fire at the polio team and fled the scene. A kid who was receiving drops also got injured in the attack," the sources said.
The kid was shifted to a nearby hospital.
The sources added that the security had been put on high alert in the area after the attack, and a search operation was underway to arrest the fleeing militants.
No group has claimed the attack yet. ■