Philippine officials say they're preparing to file criminal charges against a house caretaker who reloaded the pistol of a man who went on a shooting rampage near Manila that left nine people dead.

Deputy Cavite provincial police chief Dionicio Borromeo says John Paul Lopez surrendered to authorities late Friday, hours after the rampage, which left eight victims and the gunman dead. Eleven people were wounded in the incident in Cavite province's Kawit township.

Borromeo says Lopez explained that the gunman, Ronald Bae, had threatened to kill him if he did not reload bullets into the magazines of a .45-caliber pistol used in the killing spree.

Borromeo, however, says Lopez never tried to stop or talk Bae out of the rampage, whose victims included a pregnant woman and her young daughter.