Police investigating a Melbourne man accused of abusing children in the Philippines for a network of paedophiles around the globe are in a race against time to identify more victims.

Peter Gerard Scully, 52, was charged in the Philippines last month with sexually abusing 11 children aged between 18 months and 13 years. He has also been charged with the murder of one of his alleged victims, a 12-year-old girl, as well as rape, torture, human trafficking and cyber law violations.

Peter Gerard Scully.

Australian Federal Police investigators have flown back to their Canberra headquarters with Dutch officers to examine hard drives seized from the Philippines.

The hard drives, containing thousands of images and videos that police say belonged to Mr Scully, were expected to reveal more child victims.