Mahi Mardi, the lecturer of Ghatsila College and a married woman, had rejected the marriage proposal of the accused Chunnu Mahali.
The two had an altercation in front of her house following which Mahali attacked her with a knife, Officer-in- charge of Musaboni police station, Ramchandra Ram, said.
When her cousin Sanatan Mardi came to her rescue, he was also stabbed.
The two were now hospitalised while the accused, who is also married, was absconding, Ram said.