The IDF, Shin Bet, and Border Police have confiscated about 150 sacks of materials intended for making explosives to target soldiers.
A shootout took place at the scene and Mabhough was subsequently killed.
In recent months, the North has tested an array of weapons that include ballistic missile systems that are under development and an underwater drone.
Operation Horev was the last operation on the Egyptian front during the war, helping Israel recapture the Negev and expelled the Egyptian military from Israel’s territory.
Egypt has largely supported the blockade, viewing Hamas as a threat to its own stability.