The United Nations said it would relocate about a quarter of the UN's international staff in Pakistan, a response to the increasingly volatile security situation in the country.
At least 11 UN workers have been killed in Pakistan this year, and fears of attacks have increased over the past two and a half months. More than 500 people have died in bombings after the army's offensive against militants in South Waziristan, the Pakistani Taliban's main stronghold near the Afghan border.
Late Thursday night, two intelligence officials said a suspected US drone missile strike in North Waziristan had killed three people. The officials spoke on condition of anonymity because of the sensitivity of the information. It was not possible to independently confirm the report.