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MANILA - The Philippine Drug Enforcement Agency said Sunday it is investigating if other unauthorized persons were issued PDEA IDs and equipment following the arrest of two men posing as agents.

PDEA on Friday relieved its director in the Calabarzon region and his 61 agents due to alleged irregularities in their area, including the illegal issuance of agency IDs.

• PDEA regional director, agents relieved over extortion

The agency's regional office was found to have issued identification cards to Jhay-ar Repana and Joseph Borjal, who were arrested in Sta. Rosa, Laguna after a chase and shootout with the Parañaque police. Sachets of shabu were found in their possession.

PDEA Spokesman Director Derrick Carreon told ANC's Dateline Philippines on Sunday that it is determining if other individuals who are not organic employees of PDEA were issued IDs.

Carreon added that besides the fake IDs, illegal drugs and a firearm found on Repana and Borjal, the two also had bullet proof vests bearing the markings of PDEA.

"This is also the subject of another investigation by agency, if indeed these items, particularly, the protective equipment were lent by some personnel in agency," Carreon said in an interview with ANC's Dateline Philippines.

Relieved Calabarzon Director Archie Grande was replaced by Director Adrian Alvariño while 39 more agents from different PDEA offices are set to report to the Southern Tagalog region office.