Moninder Singh Pandher and his servant Surendra Koli, the two accused in the gruesome serial killing of children in Noida, are likely to undergo narcoanalysis tests.
Accused of sexual abuse and murder of at least 17 children, the duo was on Monday sent by the Remand Magistrate of Gautam Buddh Nagar Court to further 10 days' custody.
The court also granted police permission for narcoanalysis of the two accused.
Police have yet to zero-in on one of the three labs at Hyderabad, Ahmedabad and Bangalore for the narcoanalysis tests.
The investigators asked the court for 10 more days' remand, saying further interrogation was required to complete the recovery of the human remains of the victims.
The court had earlier sent the duo to two days' police custody that ended on Monday.
The accused were not represented by any lawyers on Monday.