The route was part of an additional three-kilometer tunnel network previously destroyed by IDF troops.
According to a former Shin Bet official, Israel has had opportunities to strike Yahya Sinwar but has aborted that operation over fear of hitting hostages.
The police noted that the terrorist had been thwarted.
Haddad, whose Reels video went viral, said, "Just as we reached your family, we will reach you too," he said, holding the passports of his wife and children.
A human rights coalition, which includes Human Rights Watch, said the convictions followed a mass trial that was "fundamentally unfair" and called for them to be immediately overturned.
The reinvasion of Gaza City followed a reinvasion of Shejaia, a neighborhood in the eastern portion of the city.
Western officials are concerned that fallout from the Israel-Hamas war will result in attacks on their turf.