The girls were returning home from a coaching center in the state of Uttar Pradesh when the attack took place, the Indo-Asian News Service reported.
Police Superintendent Abdul Hamid said the assailants could not be immediately identified because they were wearing helmets.
The victims, all in their 20s, were taken to a local hospital, the Press Trust of India reported.
One of the sisters was critically injured. The other three reported received only minor burns.
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