The prisoners in question were freed as part of the last hostage exchange and are temporarily residing in Egypt, as no other country has agreed to receive them.
UN spokesman Stephane Dujarric told a regular news briefing that the move was taken for security and operational reasons.
Bohbot, 35, and Ohana, 24, were both kidnapped from the Nova Music Festival on October 7.
The elimination took place overnight during a strike in Khan Yunis in southern Gaza.
COGAT reports a dramatic surge in voluntary departures from the Gaza Strip, with hundreds more expected weekly as medical patients, families, and dual citizens seek new beginnings abroad.
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"This elimination further degrades Hamas’ military and government capabilities," the military noted.
The Defense Ministry also updated that over 16,000 soldiers have been wounded in the current war, since October 7.
Tel Sultan is where the IDF killed former Hamas leader Yahya Sinwar and a location where many hostages were kept.
Hamas's comments come after days of increased military pressure by the IDF and diplomatic pressure from Qatar and Fatah.