Chinese drug lord died while three other high-profile inmates including Jaybee Sebastian and Peter Co were hurt in a stabbing incident inside Building 14 of the New Bilibid Prison (NBP) on Wednesday morning.
Justice Secretary Vitaliano Aguirre II said the stabbing incident happened at around 7:40 a.m.
Aguirre identified the slain Chinese drug lord as Tony Co.
He said Peter Co was in critical condition while Sebastian was already in a stable condition at the Medical Center of Muntinlupa City.
Another high-profile inmate, Vicente Sy, was also hurt in the incident. He was rushed to the Ospital ng Muntinlupa.
Building 14 houses high-profile inmates, including top drug lords.
Visitation rights of inmates in the national penitentiary have been suspended following the incident.
The stabbing incident happened even as Building 14 was heavily guarded by members of the police's elite Special Action Force (SAF).
Aguirre said that based on initial reports, the three Chinese drug lords were having a shabu session in their quarters before the stabbing incident.
He said a former police major, also an inmate, tried to stop the shabu session but Tony Co allegedly attacked him with a knife.
"Pumasok si Tony Co at sinugod ng saksak [ang former police major]," Aguirre said.
The Justice secretary said they still had no idea how the Chinese drug lords were able to sneak the shabu inside the heavily-guarded building.
He reiterated an earlier admission of the Bureau of Corrections that only 90 percent of the illegal items being hidden in the inmates' quarters have been discovered and confiscated by the SAF and BuCor operatives during Oplan Galugad implementations.
Sebastian, an alleged drug lord and gang leader, had been invited to attend the House of Representatives Committee on Justice hearing on the alleged drug trade in the NBP.
Aguirre had said that they will soon file charges against Sen. Leila de Lima, the former secretary of the Department of Justice, for her alleged involvement in the drug trade at the national penitentiary.
A witness had said during the House hearing that Peter Co gave De Lima P5 million for the release of his niece.
Aguirre, who is leaving for Vietnam on Wednesday to accompany President Rodrigo Duterte on his official trip, said he will assign people to supervise the investigation of the stabbing incident.