Two youths who had forcibly entered a house in Kokkuvil, Jaffna had attacked a female teacher who was in that house.
The female teacher is attached to Dharmapuram Vidyalaya in Kilinochchi.
Following the attack, she was admitted to Jaffna Teaching Hospital with cut injuries.
Our correspondent said a dispute over a love affair could be the reason for the attack.
Police said investigations are underway based on CCTV footage of the assailants who fled the scene on a motorcycle after attacking the teacher.