An Israeli government minister has vowed that “Gaza will be entirely destroyed” as a result of an Israeli military victory, and that its Palestinian population will “leave in great numbers to third countries”, raising fears of ethnic cleansing in the occupied territory.

The declaration on Tuesday by the finance minister, Bezalel Smotrich, came a day after Israel’s security cabinet approved a plan for Operation Gideon’s Chariots, which an Israeli official said would entail “the conquest of the Gaza Strip and the holding of the territories”.