GARDAI investigating the discovery of body parts at a waste recycling plant in Ballyfermot have now recovered "skull fragments" and sources said detectives are preparing to launch a murder probe.
A senior source told the Herald that gardai have now recovered "lots of body parts" at the Thorntons site.
It is believed that the remains all belong to the same male individual. A shocked worker first uncovered the remains while sorting through rubbish last Thursday night.
Gardai were immediately notified and a thigh and part of a pelvis were later recovered during further searches.
Gardai have since been sorting through tonnes of rubbish over the last few days and have made additional discoveries.
"Fragments of a skull have been found and lots of body parts," a source told the Herald.
"It appears as if all of these body parts came from the same person. It is looking more and more like murder at this stage," they added.
Detectives believe that the remains come from a person who met their death in the past number of weeks.
Although the hot weather may have increased the rate of decay, gardai believe that the individual died in recent weeks.
"This person could have been dead for a number of weeks, it's just very hard to tell but there is a degree of decomposition so it is not thought they died very recently," one source told the Herald.
Although no cause of death has been established, sources said that the discovery of the dismembered parts suggested there is the likelihood of foul play.
There was also no clothing found in the rubbish, leading gardai to think that the possibility of a homeless person who was sleeping in a bin getting tipped into a bin lorry by accident is now less likely.
In the last few days, the services of an anthropologist as well as specially trained garda dogs have been brought in to help try to find and identify more remains thought to be at the recycling plant.
A post mortem carried out on the leg parts was inconclusive in determining how the person died.
But more recent DNA tests have shown they belonged to a man. Further tests are being carried out now to establish a possible age and race for the victim.