Bodies of three girls were found in a dam of the Koshi River at Bairawa VDC-3 on Saturday.
The police retrieved the bodies, speculated to be of a six-year-old, three-year-old and six-month-old girls, from the water, said DSP Kedar Dhakal.
The identity of the girls, however, could not be ascertained till this evening, according to police.
Police suspected that the girls were murdered and the bodies were dumped in the dam.
A bottle of poison, a sari and a pair of slippers were found near the site, said DSP Dhakal.
Further investigation is underway.