Govt on Monday postponed a polio immunisation campaign in parts of its tribal belt, jeopardising the health of more than 350,000 children after the Taliban banned inoculations.
Local Taliban and warlord Hafiz Gul Bahadur, whose followers are fighting Western troops in Afghanistan, banned the vaccinations in the north-western region of Waziristan to protest against US drone attacks.
They have condemned the immunisation campaign, which began nation-wide on Monday, as a cover for espionage.
Fighting between government troops and local warlord Mangal Bagh also made it difficult to innoculate all children in Khyber district, officials said.
"The campaign has been postponed in North and South Waziristan and Bara (district) of Khyber," Mazhar Nisar, in charge of the polio monitoring cell at the prime minister's secretariat, told AFP.
Officials in Miranshah, the main town of North Waziristan, said a meeting of tribal elders to discuss immunisation had been postponed due to a military curfew.