Shilpa Vikas Gajre was held for killing Vaishanavi (5), Pratiksha (3) and three-month old Anushka, whose bodies were found on September 20 in a well in neighbouring Katalwedhe, said Dnyaneshwar Dhokale, Inspector of Parner police station.
Initially, a case of accident was registered but after a detailed inquiry, Shilpa was arrested for the alleged murders, police said.