Israel to my knowledge has not used bunker busters, don’t know if they have any big bombers to haul a 30 ton bomb.
Everyone has known that he has been hiding out in a hospital during the war, knowing he was safe; that the Israelis would never bomb him there.
So, more than likely he has just used this as an excuse to hide out there again, in safety.
(Note the irony that the UN and the rest of the world is accusing Israel of war crimes, when Israel has waged the most careful and civilian-friendly war in history...)