A 21-year-old college student killed his parents and sister using stones in Odisha's Jagatsinghpur district on Tuesday morning as they were opposed to his addition to online games, police said on Tuesday.

The incident took place at Jayabada Sethi Sahi under the Jagatsinghpur Police Station area around 3 AM as the student used stones or any other hard objects to smash the heads of his father, mother and sister, Superintendent of Police Bhawani Sankar Udgata said.