Hamas on Tuesday dismissed as pointless ceasefire talks with Israel, accusing it of waging a "hunger war" on Gaza as famine looms and Israel prepares for a broader assault on the war-ravaged Palestinian territory.

The comments from a senior Hamas official followed Israel's approval of a military plan involving the "conquest" of Gaza, where nearly all 2.3 million people have been displaced and a two-month Israeli blockade has worsened the humanitarian crisis.

"There is no sense in engaging in talks or considering new ceasefire proposals as long as the hunger war and extermination war continue in the Gaza Strip," Basem Naim said.