Israel says Jabalia refugee camp encircled as UN warns of 'no safe zones'

BBC update:

Israel says it has encircled the Jabalia refugee camp, which was the largest in Gaza.

The camp - in the north of Gaza - was being used as a Hamas base, the Israeli military says.

Meanwhile, Israel continues its bombardment of the southern Gaza Strip - including the city of Khan Younis, which has been partially evacuated.

An Israeli military official says - so far - more than 800 Hamas tunnel shafts have been located and 500 of them destroyed.

Unicef says there are "no safe zones" anywhere in Gaza, while the World Health Organization warns the situation gets "worse by the hour".

The Hamas attack on southern Israel on 7 October killed 1,200 people, with around 240 others taken hostage.

Gaza's Hamas-run health ministry says more than 15,800 people have been killed in Israel's retaliatory campaign, including about 6,000 children.