Neogen - I think that's what the Malaysians are trying to hide. An embarrassment of major proportions.
A radar operator sighted an unknown radar return, pointed it out to a "chief" - and it was dismissed as a flock of birds.
Either that - or the "chief" was sound asleep at home, and it was common knowledge he didn't like to be awakened, only to find a flock of birds being reported as an "intrusion".