Israeli military strikes have killed at least 15 Palestinians in the Gaza Strip over the past 24 hours, the enclave's health ministry said on Sunday, as Arab and U.S. mediators work to shore up a fragile ceasefire between Israel and Hamas.

The Al-Khair Foundation says staff were setting up a camp for displaced Gazans in Beit Lahia Saturday when back-to-back Israeli strikes hit their vehicles.

At least five Palestinians were killed, including two local journalists, and others wounded on Saturday in an Israeli strike on Gaza's northern Beit Lahiya town, medics told Reuters, as Hamas' leaders hold Gaza ceasefire talks with mediators in Cairo.