A U.S.-backed mechanism for getting aid into Gaza should take effect soon, Washington's envoy to Israel said on Friday ahead of President Donald Trump's visit to the Middle East, without detailing how this would work with no ceasefire in place.

A group of American security contractors, ex-military officers and humanitarian aid officials is proposing to take over the distribution of food and other supplies in Gaza based on plans similar to ones designed by Israel.

The United Nations and its partners have condemned the proposals by Israel, which has been barring deliveries of food and medicine for months.