Death toll mounts amid Gaza strikes

Thousands of Palestinians are fleeing northern parts of Gaza after Israel warned it was targeting the area in its campaign to stop rocket attacks.

The UN says 17,000 people have sought refuge in its facilities as Israeli air strikes continue for a sixth day.

Israeli forces have raided a suspected rocket-launching site in Gaza in their first reported ground incursion.

The BBC's Middle East Editor Jeremy Bowen reports from Gaza.