More pictures have been published overnight of US authorities building a pier off Gaza to deliver humanitarian aid by sea.
The US Central Command published the pictures on X, saying construction of the floating pier was underway.
The US and Israel have both said they hope to have the pier in use by early May.
Reuters news agency previously reported the estimated cost of the pier has risen to $320m (£278m), double the initial figure, according to a person familiar with the matter.
"The cost has not just risen, it has exploded," senator Roger Wicker, the top Republican on the Democratic-led Senate Armed Services Committee, said when asked about the costs.
"This dangerous effort with marginal benefit will now cost the American taxpayers at least $320m to operate the pier for only 90 days."
The pier will initially handle 90 trucks a day, but that number could go up to 150 trucks daily when it is fully operational.