Israeli tanks advanced to the edge of a crowded district in the heart of Rafah on Wednesday during one of the most intense nights of bombardment of the southern Gaza city since Israel launched its offensive there this month.

Israel's assault on Rafah on Gaza's southern edge has set hundreds of thousands of people fleeing in what had been a refuge for half of the enclave's 2.3 million people.

It has also cut off the main access routes for aid into Gaza, drawing international fears of mass casualties and famine.