Israeli forces press Gaza offensive from north and south

Israeli forces pushed deep into the ruins of Gaza's northern edge on Monday to recapture an area from Hamas fighters, while in the south tanks and troops pushed across a highway into Rafah, leaving Palestinian civilians scrambling to find safety.

Some of the most intense fighting for weeks is raging in both the north and south. Israeli operations in Rafah, which borders Egypt, have closed a main crossing point for aid, which humanitarian groups say is worsening an already dire situation.

Hundreds of thousands of people are being forced to flee again after around half of Gaza's population took sanctuary there after Israel ordered evacuations from northern Gaza in October.

Gaza's health authority appealed for international pressure to reopen access via the southern border to allow in aid, medical supplies and fuel to power generators and ambulances.

"The wounded and sick suffer a slow death because there is no treatment and supplies and they cannot travel," it said.

A foreign U.N. staff member was killed on Monday when a vehicle travelling to a hospital in Rafah was struck - the first international U.N. casualty in the Gaza war, a U.N. spokesperson said.