28-year old Bina Bai Koli along with her three daughters Monika (6), Khushbu (4) and Muskan (2) went missing from her home yesterday morning.
When she returned home last evening, her in-laws asked her about the whereabouts of the girls following which she stated that she had killed them on a hillock, police said today.
When the family members and locals rushed to the spot, they found mutilated bodies of the girls.
The woman allegedly administered poison to her daughters and then crushed the bodies with stones, police said, adding the woman was suffering from depression.