MANILA (UPDATE) - The Philippine National Police has filed murder charges against two Ilocos Sur policemen for the killing of a 15-year-old girl who accused them of rape.

In a statement released Sunday, PNP Spokesperson Police Brigadier Gen. Bernard Banac said Police Staff Sergeants Randy Ramos and Marawi Torda are now under restrictive custody at the Ilocos Sur Police Provincial Office in Bantay town.

The two are suspects in killing a female teenager who filed rape charges against them in the town of Cabugao, Ilocos Sur.

PNP Chief General Archie Gamboa said he wants "the stiffest penalty for the two policemen."

"They are not men in uniform but animals who deserve to be jailed for life. Walang awa, walang puso, walang kwentang pulis (They have no mercy, no heart, they are worthless policemen)," he said.

Gamboa ordered the chief of the Region 1 Police Office to assist the 18-year-old cousin of the murdered girl, who also filed charges against Ramos. The PNP Chief said he wants to ensure the availability of all PNP witnesses in court proceedings to expedite the murder trial.

The National Police Commission is also investigating the incident, its vice chairman Rogelio Casurao said Monday.

"We are now in the process of getting our own independent source so we can claim any investigation that maybe published or established by Napolcom is really a product of an impartial and unbridled investigation so there will be no indications of whitewash or cover-up," he told ANC.

The two victims were arrested for violation of curfew when Ramos and Torda allegedly took advantage of them, according to Cabugao police.

After filing charges against Ramos and Torda, the 15-year-old victim was gunned down on her way home.

• Teenager na nagreklamo ng rape vs 2 pulis, patay sa pamamaril