Twenty-five countries including Britain, France and Canada, have called for an immediate end to the war in Gaza.

Britain and more than 20 other countries called on Monday for an immediate end to the war in Gaza and criticised the Israeli government's aid delivery model after hundreds of Palestinians were killed near sites distributing food.

Israel over "drip feeding" of aid to Palestinians and say "the war in Gaza must end," just as it looks set to expand.

The foreign ministers of 25 Western nations have slammed Israel for “drip feeding” aid into the Gaza Strip, as the health ministry in the territory said that more than 1,000 people have been killed seeking humanitarian relief there since late May.

Israel warned it would move for the first time into a town in the heart of the Gaza Strip that it had earlier skirted for fear of harming hostages, as it accused Hamas of stalling at US-brokered ceasefire talks and the war’s toll on Palestinian civilians spiraled.

The pair were arrested at the Tomorrowland festival after two organisations reported them to authorities over alleged war crimes committed in Gaza.

The head of the agency that helps oversee international aid deliveries to the territory had criticized the impact of Israeli policy on civilians.

Witnesses and Gaza hospital officials say Israeli troops have killed at least 32 Palestinians near aid distribution hubs in the latest deadly violence around people seeking desperately needed food.