The US pier in Gaza is facing its latest challenge — whether the UN will keep delivering the aid

The U.S.-built pier to bring food to Gaza is facing one of its most serious challenges yet — its humanitarian partner is deciding if it's safe to keep delivering supplies arriving by sea to starving Palestinians.

The United Nations, the player with the widest reach delivering aid within Gaza, has paused its work with the pier after a June 8 operation by Israeli security forces that rescued four Israeli hostages and killed more than 270 Palestinians.

Rushing out a mortally wounded Israeli commando after the raid, Israeli rescuers opted against returning the way they came, across a land border, Rear Admiral Daniel Hagari, an Israeli military spokesman, told reporters. Instead, they sped toward the beach and the site of the U.S. aid hub on Gaza’s coast, he said. An Israeli helicopter touched down near the U.S.-built pier and helped whisk away hostages, according to the U.S. and Israeli militaries.

For the U.N. and independent humanitarian groups, the event made real one of their main doubts about the U.S. sea route: Whether aid workers could cooperate with the U.S. military-backed, Israeli military-secured project without violating core humanitarian principles of neutrality and independence and without risking aid workers becoming seen as U.S. and Israeli allies — and in turn, targets in their own right.

Israel and the U.S. deny that any aspect of the month-old U.S. pier was used in the Israeli raid.

The U.N. World Food Program, which works with the U.S. to transfer aid from the $230 million pier to warehouses and local aid teams for distribution within Gaza, suspended cooperation as it conducts a security review. Aid has been piling up on the beach since.

“You can be damn sure we are going to be very careful about what we