Mounting violence and increasing attacks against humanitarian workers have forced the United Nations to close its offices in Pakistan's Tehsil Bagh region for two weeks.
The Office of the UN Resident Coordinator in Pakistan said in a statement on Wednesday the decision had been taken "in view of the current security situation and the prevailing tensions".
Only emergency services will continue during the next two weeks, while UN officials will consult Government authorities and monitor the situation before announcing any resumption of activities.
UN aid workers have been particularly active in Bagh district since the devastating earthquake struck the region in October 2005.
The statement said that the UN had decided to enhance its coordination and communication links with the rest of the humanitarian community and with Bagh civil authorities and local community leaders.
A communication plan will also be developed to better inform the local community about the activities and policies of the world body.