The incident occurred at Mount Hermon near the demarcation line with Syria. Details on how the Israeli grenade went off were being investigated.
The two soldiers killed were identified as Staff Sergeant Hussam Tafesh, a 24-year-old Druze, and Sergeant Shlomo Rindenow, 20 and originally from the United States.
Israeli media reported that one of the soldiers exited an army vehicle holding the grenade and approached another soldier standing outside the outpost when it exploded.