A worst-case scenario of famine is unfolding in Gaza and immediate action is needed to end fighting and allow unimpeded aid access, a global hunger monitor warned on Tuesday, saying failure to act now would result in widespread death.

Its alert coincided with a statement from Gaza health authorities saying Israel's military campaign had now killed more than 60,000 Palestinians.

The Integrated Food Security Phase Classification (IPC) raised the prospect that the man-made starvation crisis could be formally classified as a famine, in the hope that this might raise the pressure on Israel to let far more food deliveries in.