Two more bags full of human remains were recovered on Tuesday from the drains near the house of Moninder Singh Pandher, accused of sexually abusing and killing several children along with his manservant Surendra.
With Tuesday's findings, the total of such bags recovered since Saturday has gone up to 42.
"We have been cleaning the drains for the fourth day in a row. Today, our experts found two plastic bags full of bio-medical remains," said a Central Bureau of Investigation (CBI) source.
"The human remains have been sent to the laboratory for post mortem and DNA extraction," he said.
On Monday, CBI recovered several plastic bags full of bones, intestines and other body parts along with clothes, bangles and slippers from the sewage drains.
These bags were found from two drains - one behind Pandher's D-5 bungalow in Sector 31 of Noida and another a few yards away from the main gate.
Moninder Singh and his domestic help Surendra were arrested Dec 29 for the murders of children, who had gone missing from Nithari village nearby.
Over 30 officers, consisting of sleuths from the Central Bureau of Investigation (CBI) and forensic experts, are busy piecing together the clues found so far. The case was handed to them on last Thursday.
On January 13 (Saturday), CBI experts found three more skulls from the drains taking the total number of skulls recovered so far to 20.
Though officially the number of skulls found has been put at 20, there could be more, say sources.
Over the last two years, 38 children had gone missing from Nithari, home to over 25,000 people, mostly migrants from West Bengal who earn their livelihood by pulling rickshaws, working as daily-wage labour or as domestic help in the nearby residential colonies.