The head of the Israeli military, Lieutenant General Herzi Halevi, said lessons would be drawn from the security failures around Gaza that enabled the attack.
Scores of Israeli and foreign hostages were taken back to Gaza; Israel says it has identified 97 of them.
Amid international calls for a ceasefire to allow in aid, Israeli Energy Minister Israel Katz said there would be no halt to the siege without freedom for Israeli hostages.
The Israeli military said it does not comment on such reports.
The Israeli military says it has responded with artillery fire to launches coming from Lebanese territory.
Persons:
Abbas, Antony Blinken, Blinken, General Herzi Halevi, Benjamin Netanyahu's, Kan, Cross, Fabrizio Carboni, Israel Katz, Khan Younis, Abu Mustafa, Najib Mikati, Jordan, King Abdullah, Mahmoud Abbas, Fatah, Jerusalem's Mount Herzl, Ibrahim Hamdan, Hamdan, Henriette Chacar, Dedi, Maayan Lubell, Emily Rose, Nidal, Emma Farge, Jeff Mason, Peter Graff, Alexandra Hudson, Alex Richardson, Nick Macfie, Toby Chopra, Lisa Shumaker
Organizations:
U.S, NATO, Public, International Committee, United Nations, Food Programme, ICRC, Israeli Energy, Israel, United Nations Security, Palestinian Authority, West Bank, Reuters, Thomson
Locations:
Washington, Egypt, Israel, JERUSALEM, GAZA, TEL AVIV, Gaza, Syria, Damascus, Aleppo, Iran, Lebanese, Jerusalem's Mount, Jerusalem, Geneva