WASHINGTON (AP) — The U.S. and allies are scrambling to pull together a complex system that will move tons of humanitarian aid into Gaza by sea. Nearly two months after President Joe Biden gave the order, U.S. Army and Navy troops are assembling a large floating platform several miles off the Gaza coast that will be the launching pad for deliveries.

But any eventual aid distribution — which could start as soon as early May — will rely on a complicated logistical and security plan with many moving parts and details that are not yet finalized.

The relief is desperately needed, with the U.N. saying people in Gaza are on the brink of famine. But there are still widespread security concerns. And some aid groups say that with so much more needed, the focus should instead be on pushing Israel to ease obstacles to the delivery of aid on land routes.