UN reviews security after Pakistani Taliban 'threat'
26 August 2010 Last updated at 15:34 BST
A senior US official has told the BBC that the Taliban are planning to attack foreigners helping with the aid effort in flood-hit Pakistan.
The official also said federal ministers in Islamabad may be at risk.
The warning comes as thousands more people have been forced to leave their homes in the coastal areas of the country as the floods make their way south.
Jill McGivering reports.