An Israeli airstrike killed seven people late on Monday at a café near the southern Gaza city of Khan Younis, Palestinian medics said, bringing the death toll from Israeli strikes since Sunday night to at least 37.

In central Gaza, Israeli forces earlier on Monday sent tanks into the Nuseirat camp from the west, sparking panic among residents and displaced families as advancing tanks opened fire.

Twenty people were killed by air and ground strikes in Nuseirat, one of the Gaza Strip’s eight historic refugee sites, overnight and into Monday, including some in a tent encampment, health officials at Al-Awda Hospital in Nuseirat said.

Resident Zaik Mohammad said the tank incursion caught residents by surprise.

“Some people couldn’t leave and remained trapped inside their homes, appealing to be allowed out, while others rushed out with whatever they could carry as they fled,” Mohammad, 25, who lives one kilometre (half mile) away from the targeted area, told Reuters via a chat app.

There was no Israeli comment on Monday’s violence.