So far, at least 40 security staff from the Office for Transportation Security (OTS) are under investigation after complaints from passengers at NAIA airport.
On Monday, Manila International Airport Authority (MIAA) spokesman David de Castro sought to assure passengers that authorities were investigating an alleged bullet planting scam.
At least five people have been arrested this week for allegedly carrying live bullets in their luggage or bags, four at NAIA and one at Davao International Airport.
It is thought that as many as 2,000 people have fallen for the scam, with many paying an on-the-spot bribe in order to continue their journey.
The security personnel under investigation will have their access passes revoked.
However, the source also said that firing them or taking them away from their duty would “embarrass” them.