A former security person died of tipper hit on Monday.Former Deputy Superintendent of Police at National Investigation Department, Bishnu Thapa, was hit by a tipper while he was heading to Kalaiya from Piluwa in a motorcycle. Seriously injured in the incident, he breathed his last at Kalaiya Provincial Hospital on Monday evening.Thapa, a resident of ward no 7 of Kalaiya sub-metropolis was recently retired from job. Police informed that the tipper driver has been absconding after the incident.Investigation is underway, the police added.