The parents of "Oplan Tokhang" victims on Thursday filed criminal and administrative charges against seven officers of the Manila Police District who were involved in two separate anti-drug operations in Manila.

Denisse David, father of John Jezreel, and Normita Lopez, mother of Djastin, with the assistance from the National Union of Peoples Lawyers, filed the cases against the policemen at the Office of the Ombudsman.

LOOK: Dennise David & Normita Lopez (parents of two tokhang victims), with the assistance of the NUPL, file criminal raps vs MPD cops pic.twitter.com/zs4D3yiBVS

— Adrian Ayalin (@adrianayalin) September 28, 2017

Police Chief Insp. Leandro Gutierrez, Police Officer 3 Joel Pelayo, Police Officer 3 Ponciano Barredo, Police Officer 2 Osmond Pring, Police Officer 2 Eduardo Lacson, as well as Police Sr. Insp. Jojo Salanguit, Police Officer 3 Gerry Genalope and three John Does are facing charges of murder, planting of evidence under the drugs and firearms laws as well as administrative charges for gross misconduct, grave abuse of authority, gross oppression and for conduct unbecoming of police officers.

Gutierrez, Play, Barredo, Pring and Lacson are involved in the case of David while Salanguit and Genalope are charged in connection with the death of Lopez.

According to the National Union of Peoples' Lawyers (NUPL), 21-year-old David figured in an alleged buy-bust operation which led to his death in Del Pan Street, Manila in February.

• In face of drug slays, silence is complicity: CBCP exec

The NUPL added that on May 18, 23-year-old Lopez was just sitting along the railroad tracks when he was accosted and was eventually shot by a policeman.