The incident at Karegaon village, 58 km from here, led to protests by Dalit organisations in parts of the district.
According to police, the girl and her sister went outside their home to relieve themselves Saturday afternoon.
After they returned, the girl suddenly took ill.
The doctors informed police that the girl could have been sexually assaulted as there were small injuries to her private parts.
The girl's parents are daily wagers.
Dalit organisations gave a call for shut-down in Shrirampur Sunday to protest the incident. Many shops and commercial establishments in the town remained closed.
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