Police have arrested one person, Pramod, in this regard while the other two accused, Veerpal and Sanjeev, are still at large.
Quoting a complaint filed by the victim's husband, police said the incident occurred last night when the three youths poured kerosene on the woman and her sons, aged two and five, through the window of the house and set them ablaze.
Police said the victims are being treated at the district hospital.