A tribal woman was seriously injured, while her husband and two daughters escaped unhurt when Naxals attacked their house in Gadchiroli district, police said today. The incident took place late last night in Laheri village under Bhamragadh taluka of the Naxal-affected district, around 400km from here in the Vidarbha region. A statement from the office of the Superintendent of Police, Gadchiroli, said a group of Naxals opened fire at the house of one Mura Guddi Parsa at 11 pm.