A police contingent on Friday visited a village in Malda district of West Bengal to inquire into the antecedents of Maya Sarkar, domestic help of Mohinder Singh Pandher.
Pandher is prime accused in the serial killing of children in Noida.
Maya Sarkar, who has been arrested in Noida, hails from Nalagola Purbapara village under Bamungola in Malda district.
The Officer-in Charge of Bamungola police station Anil Roy, who visited the village, said the police would also inquire into the number of children missing from the area in the last two years in view of the Noida killings.
Roy said that Maya Sarkar had been working in Noida with her husband Nitya Sarkar. The couple had left the village to earn a living.
Maya was the second wife of Nitya. His first wife too lived and worked in Noida, police said.
Nitya has two children, aged 15 and 11, by his two wives.
Both children are in school. Villagers told the police that the family, once poor like their neighbours, used to visit the village once in a while and had of late adopted a flashy lifestyle raising the suspicion of neighbours.