"Three teams have been formed to nab the assailant Krishna who was given the job recently," SP city Ashok Kumar, who had reached the spot with SSP Mohit Gupta, said.
According to police, the servant killed Munni Devi (55) when she was alone at her house.
He also looted ornaments worth about three lakh, Rs 50,000 cash and the woman's mobile phone.
At the time of murder, the woman's husband had gone to Agra for some business-related work.
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