The accused had threatened his wife and step daughter not to disclose the matter to anyone, they said.
The girl and her mother escaped from the house on Thursday when the accused had gone somewhere, police said.
"The mother and the daughter reached the Maheshnagar Police station and narrated the entire episode," a police official said.
Police said the accused absconded as soon as he got the information that the matter was reported to the police.
Raids were being conducted at several places in search of the accused, police said, adding that further investigations were underway.