Armed forces chief Lieutenant General Eyal Zamir "approved the main framework for the IDF's operational plan in the Gaza Strip," a statement released by the army said.

Prime Benjamin Minister Netanyahu's government has not provided a precise timetable for when Israeli troops will enter the territory's largest city, where thousands have taken refuge after fleeing previous offensives.

Gaza's civil defence agency said Israeli air strikes on Gaza City have intensified in recent days, with the residential neighbourhoods of Zeitoun and Sabra hit "with very heavy air strikes targeting civilian homes, possibly including high-rise buildings".

News of the military's approval of the plan comes hours after Hamas said a senior delegation had arrived in Cairo for "preliminary talks" with Egyptian officials on a temporary truce.

The Netanyahu government's plans to expand the Gaza war after more than 22 months of fighting have sparked an international outcry as well as domestic opposition.

UN-backed experts have warned of widespread famine unfolding in the territory, where Israel has drastically curtailed the amount of humanitarian aid it allows in.

Hamas's October 2023 attack which triggered the war resulted in the deaths of 1,219 people, according to an AFP tally based on official figures.

Israel's offensive has killed at least 61,599 Palestinians, according to figures from the health ministry in Hamas-run Gaza which the United Nations considers reliable.