The administration of President Barack Obama has deployed unmanned Predator drones in Yemen to hunt for Al-Qaeda operatives who are becoming increasingly active in that Arab country, The Washington Post reported Sunday. But citing unnamed senior US officials, the newspaper said US military and intelligence operatives have not fired missiles from these aircraft because they lack solid intelligence on the militants' whereabouts. Last month, two packages addressed to synagogues in Chicago containing the hard-to-detect explosive PETN hidden in printer ink cartridges were uncovered in Dubai and Britain's East Midlands Airport, sparking a global scare.