Abubakar spoke during an interactive session with journalists in Abuja.
Responding to the question on if the NAF had any intelligence on whether the Chibok girls were in the Sambisa Forest or not, Abubakar said:
“Honestly we don’t. That is the truth of the matter. Even if you see women that are dressed in hijab, how are you sure they are women, that they are not men?
“It is only when you get there and they remove the hijab that you now realise that they are men and they have their rifles.
“There is no credible intelligence that will specifically tell you that these girls are here.”
Abubakar said the NAF flew its planes daily with the hope of sighting the Chibok girls, adding that the military, like other Nigerians, was passionate about them.
He said: “There is no day that the sun rises and sets that we do not go out hoping to see these girls.
“From January this year to August 17, we flew 2,600 hours.
“About 50 per cent of that was Intelligence Surveillance Reconnaissance.
“We are hoping that through the intelligence, we will be able to capture the movement of those girls, we will be able to locate what we consider legitimate targets.”