Fighter jets targeted Dattakhel area of North Waziristan where the army launched a massive operation to clear the area of militants in June last year which is still ongoing.
"Twenty-five terrorists were killed in precise aerial strikes today," the military said in a brief statement.
The identity of those killed was not known but the area is infested with al-Qaeda-linked Taliban militants.
The toll could not be independently verified through sources as the conflict zone is off-limits to the media.
The army says over 3,000 militants have been killed in the operation so far.
