Israeli airstrikes and gunshots have killed at least 25 people overnight in Gaza, health officials and ambulance service said Saturday, as cease-fire talks seem to stall and Palestinians face worsening famine.

The majority of victims were killed by gunfire as they waited for aid trucks close to the Zikim crossing with Israel, said staff at Shifa hospital, where the bodies were brought.

Israel's army didn't respond to request for comments about the latest shootings.

Those killed in strikes include four people in an apartment building in Gaza City among others, hospital staff and the ambulance service said.

The strikes come as cease-fire talks between Israel and Hamas have hit a standstill after the U.S and Israel recalled their negotiating teams on Thursday, throwing the future of the talks into further uncertainty.