17-year-old Elie Michel Matta from the town of Aaqtanit in the Sidon District of South Lebanon was stabbed to death while he was at home.
According to the state-run NNA on Thursday, unknown persons stabbed him with a knife more than 30 times and then threw his body from the roof of the house.
Security forces and ambulances rushed to the scene, and the body was transferred to the hospital, where forensic doctors examined it.
Investigations are ongoing.