Defense Minister Yoav Gallant met top officials over three days in Washington as he voiced hope for quietly working through disagreements with Israel's vital ally, drawing an implicit contrast to Netanyahu's more confrontational approach.

"During the meetings we made significant progress, obstacles were removed and bottlenecks were addressed," Gallant said after meeting with Jake Sullivan, Biden's national security advisor.

Gallant said the progress was on "a variety of issues" including "the topic of force build-up and munition supply that we must bring to the state of Israel."

"I would like to thank the US administration and the American public for their enduring support for the state of Israel," he said.

Netanyahu in recent days has publicly accused the Biden administration of slowing down weapons deliveries to Israel, which has been at war in Gaza since an October 7 attack by Hamas.

US officials have denied the accusations and showed annoyance, months before an election in which Biden's support for Israel has become a liability with a left flank of his Democratic Party outraged by the heavy death toll among Palestinian civilians.

The United States in early May froze a shipment that included 2,000-pound bombs and Biden warned of a further halt as he pressed Israel not to carry out a wide-scale military assault of Rafah, the southern Gaza city where more than one million displaced Palestinians had sought shelter.

A senior US administration official said the United States has sent more than $6.5 billion in weapons to Israel since October 7, with nearly $3 billion alone in May.

"This is a massive, massive undertaking and nothing is paused other than one shipment," the official told reporters on condition of anonymity.

The official blamed the rift on misunderstandings of the "complex" US bureaucratic process. He said Gallant's team and US experts went through "every single case."

"There was real progress and a mutual understanding of where things stand, of prioritization of certain cases over others, so that we can make sure that we are moving things in ways that meet the needs of the Israelis," he said.

- Seeking calm in Lebanon -

Biden -- whose approach to Israel has drawn criticism both from progressives and the right --- held off on curbing weapon deliveries after Israel carried out what US officials described as comparatively targeted operations in Rafah.

Netanyahu and Gallant have said the most intense phase of the fighting is over -- with Israel set to shift forces toward the border with Lebanon after rising skirmishes with the Iranian-backed militant movement Hezbollah.

The US official said Washington remained in "fairly intensive conversations" with Israel, Lebanon and other actors and believed that no side sought a "major escalation."

Gallant, who met twice in Washington with Amos Hochstein, the US pointman between Israel and Lebanon, warned that his military can "inflict massive damage" on Hezbollah if war breaks out.

"We do not want war, but we are preparing for every scenario," Gallant told reporters.

US officials including Secretary of State Antony Blinken have voiced hope that a ceasefire in Gaza could lead to a reduction in tension over Lebanon as well.

Biden on May 31 laid out a plan for a temporary ceasefire and release of hostages, but Hamas came back with further demands.

Despite criticism of the proposal from some of Netanyahu's far-right allies, Gallant said, "We are all committed to and firmly backing the president's deal."

"Hamas must accept it or bear the consequences," he said.

The Gaza war began with Hamas's October 7 attack on southern Israel that resulted in the deaths of 1,195 people, mostly civilians, according to an AFP tally based on Israeli figures.

The militants also seized about 250 hostages, 116 of whom remain in Gaza, although the army says 42 are dead.

Israel's retaliatory offensive has killed at least 37,718 people, also mostly civilians, according to data from Hamas-run Gaza's health ministry.