International aid groups have said there is nothing more they can do to protect staff in the Gaza Strip and that it is up to Israel to avoid killing them as the United Nations appealed for direct humanitarian coordination with the Israeli military, Reuters reports.

While some aid groups have suspended operations following the strike on the World Central Kitchen convoy on Monday, none have said they plan to withdraw from Gaza despite the repeated attacks on aid operations in Gaza. The United Nations warns a famine is imminent. It has long complained of obstacles to getting aid in and distributing it throughout Gaza.

“Every day we are forced to decide whether to suspend an operation or to proceed with an operation - and often the decision is to suspend because we don’t have the proper security conditions in place,” Scott Paul, associate director for peace and security at Oxfam America, told reporters.

The UN and international aid groups operating in Gaza said they share the locations of all premises and planned movements with the Israeli authorities and are in daily contact. The United States said on Tuesday that it was “unacceptable and inexplicable” that the Israeli military’s procedures to avoid harming aid workers were not functioning appropriately.

“One of the things that would probably improve the system … is for us to have the ability to have more direct contact with the military as opposed to going through a number of layers of military-civilian coordination as it does now,” UN spokesman Stephane Dujarric said on Thursday.