The 17-year-old girl was rushed to a hospital where she is stated to be critical, police said.
Ludhiana Police Commissioner Pramod Ban said two persons have been arrested in connection with the incident while others are still absconding.
The girl had lodged a complaint of rape against three of them two months ago. The three were arrested and just last week released on bail, Ban said.
Today, six persons, including the three rape accused, reached the girl's residence and allegedly set her ablaze after sprinkling kerosene on her, he added.