After tracking down the whereabouts of the migrant workers with the help of their mobile signal location, a 10-member police team went to Jaipalguri in West Bengal and took them into custody with the help of police there few days back, Superintendent of police P Moorthy told reporters here.
The three, identified as Bindu Malik, Ajay Roy and Samrat, left to their native in West Bengal after murdering the woman Rajamani and stealing Rs one lakh and six sovereign gold ornaments from her house on December 25, he said.
Police recovered the booty from them, Moorthy said.
Moorthy said police was monitoring the movements of migrant workers in the city. The department has already started creating a data base of such workers, he said.