Food and water supplies are dwindling in Gaza following a blockade imposed by Israel in retaliation of Hamas's weekend attack.

Its last power station has run out of fuel.

Hundreds of buildings have been reduced to rubble and more than 1,000 Palestinians have been killed in retaliatory attacks in the territory run by the Hamas military group.

Satellite imagery of a dense residential area in northern Gaza captured yesterday shows multiple buildings destroyed and covered in ash following a series of attacks.

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The image below taken by Maxar shows an area home to dozens of houses, shops and a library.

Residential area destroyed

Israeli Prime Minister Benjamin Netanyahu warned Gaza civilians of the horrors to come, promising to unleash the full force of the Israeli military on the strip after Hamas's mass attack on Saturday.

Footage posted earlier today by the IDF also shows Israeli strikes on the Islamic University of Gaza, which it claims was being used as a Hamas training camp for military intelligence operatives and to produce weapons.

IDF hits university in Gaza

Based on analysis of previous satellite imagery of the campus on Google Maps, the IDF hit at least four of the university's buildings.

While satellite imagery reveals the physical scale of destruction, footage from social media on the ground shows the reality of these strikes for Palestinians.

Footage filmed at the Al Shifa Medical Complex in Gaza showed a mother screaming after finding out her children were killed.

"My kids were killed without eating first, I swear they were killed before even eating," she said in a video posted by a journalist.

The UN's World Health Organization said that supplies it had pre-positioned for seven hospitals had already run out amid the flood of wounded.

'Everything has been destroyed'

The sealed-off strip is under a "total siege" imposed by Israel, with food, water and power denied to citizens from the outside.

The Sky News team on the ground has been speaking to residents.

One woman inside the Gaza Strip told Sky News that "everything has been destroyed".

She said: "Two days ago they gave us a warning, we left the house. Yesterday my husband came here to grab our stuff, they say they dropped phosphorus bombs.

"They burnt the entire area, the whole area had to leave. We didn't sleep the whole night... I didn’t think the situation would stay like this.

"I found my daughter and my son, but where will we go?".

For Murad Abed, no warning came, and he was hesitant to leave his home.

"There's no point, nowhere is safe… The Israelis are just hitting indiscriminately," he said.

Another resident, Mansour Rayan said Israeli forces "carried out a belt of fire".

"A shell descended each second and the houses and streets would shake," he said.

"This is an usurping occupier, a criminal occupier, it targets hospitals, it targets towers, it targets commercial stores, it kills children, it kills women, and it has no deterrent."

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The Israeli strikes were sparked by a deadly assault by Hamas militants over the weekend which has left over 1,200 Israelis dead.