A student at Dharan Higher Secondary School on Wednesday stabbed his classmate over a petty dispute, leaving him critically injured. 

Police said Rabi Singh, an 11th grader at the school, stabbed his classmate Biplov Parajuli of Dharan-16. The school is based in Laxmi road at Dharan Sub-metropolitan-1, Sunsari.

Eyewitness at the school said the two were joking around about something early in the morning which later turned into a dispute. After the school was over, Singh ran towards Parajuli when he was heading home and stabbed him on his chest.

Singh was staying in a rented room at Dhankute Road in Dharan-8. He is on the run after the incident.

Injured Parajuli has been receiving treatment at the Intensive Care Unit (ICU) of B.P. Koirala Institute of Health Sciences. Doctors involved in his treatment said they have transfused six pints of blood but failed to control the bleeding. His situation has been described as critical.

Dharan Area Police Station SP Rameshwor Poudel informed they have intensified search for the absconding Singh.