ISLAMABAD, March 1 (Xinhua) -- The death toll rose to 14 in the bomb attacks that hit the vehicles of security personnel in Pakistan's northwestern tribal region of Khyber Agency on Saturday, officials said.
Assistant Civil Administrator of Khyber Agency Jahangir Wazir said that at least 14 people including a child and 13 security personnel were killed and four others injured when three bomb blasts hit two vehicles of the security forces in the Jamrud Town of Khyber Agency, a restive region bordering Afghanistan.
Wazir said that the unknown terrorists attacked the two convoys comprising the personnel of Levies Force and Frontier Constabulary, with bomb blasts followed by intensive firing at them in two different areas of Jamrud Town.
The personnel of Levies Force and Frontier Constabulary, a paramilitary force, were on duty for the security of health workers who were running a campaign for polio vaccination in the region.
The security personnel retaliated the attacks and saved the polio workers by sending them into nearby houses.
The explosions and firing destroyed the vehicles completely and spread panic in the area.
Local people and rescue teams shifted the bodies and injured to hospital.
According to the officials, the bombs were planted on the roadside and were triggered with a remote controlled device.
Security forces have cordoned off the area and launched a search operation to arrest the culprits.
No group claimed responsibility for the attacks yet.
Despite a number of vaccination campaigns over the years, Pakistan is still one of only three countries in the world where the polio virus is still endemic.
Militants in Pakistan have been opposing polio vaccination and consider such campaigns a move to make Muslim boys sterile and a cover for spying.