BBC :
The delayed arms shipment comes as US President Joe Biden faces mounting domestic pressure – from Democratic lawmakers and some parts of the US public – to rein in Israeli operations in Gaza amid rising civilian deaths and a worsening humanitarian situation.
Despite firm and vocal US opposition, Israel appears poised to mount a large-scale invasion of Rafah, a congested part of southern Gaza that is Hamas’ last major stronghold in the territory.
US officials have warned that an operation in the city – where the population has swelled with refugees from other parts of Gaza – could lead to extensive civilian casualties.
IDF spokesman Daniel Hagari told a news conference that the US had provided “unprecedented” security assistance since the beginning of the war, adding that disputes between the allies were resolved “behind closed doors in a matter-of-fact way”.
“We are responsible for the security interests of the State of Israel, and we are attentive to the interest of the United States in the region,” he said.
Overnight, there were further Israeli air strikes in the Gaza Strip, hours after Israeli forces backed by tanks took control of the Palestinians side of the key Rafah crossing on the border with Egypt.
The Israeli bombardment was particularly intense around Rafah. Local medics said seven members of one family were killed in one strike.
Rafah has been a key entry point for aid and the only exit for people able to flee since the start of the war between Israel and Hamas last October.
The crossing remained closed on Wednesday morning, but the Israeli military said it was reopening the nearby Kerem Shalom crossing, which had been closed for four days because of Hamas rocket fire.
On Monday, the Israeli military ordered tens of thousands of civilians to begin evacuating nearby eastern parts of Rafah city, ahead of what it called a “limited” operation to eliminate Hamas fighters and dismantle infrastructure.
Meanwhile, efforts continue to reach a ceasefire, alongside the release of Israeli hostages and Palestinian prisoners. In Cairo, delegations from Israel and Hamas have resumed negotiations through mediators.
After refusing to confirm or deny reports of delayed weapons shipments over two days, a US official on Tuesday finally confirmed that at least one shipment of bombs was delayed this week.
“The US position has been that Israel should not launch a major ground operation in Rafah, where more than a million people are sheltering with nowhere else to go,” the senior US administration official said on Tuesday.
“We have been engaging in a dialogue with Israel in our Strategic Consultative Group format on how they will meet the humanitarian needs of civilians in Rafah, and how to operate differently against Hamas there than they have elsewhere in Gaza.
“Those discussions are ongoing and have not fully addressed our concerns.
As Israeli leaders seemed to approach a decision point on such an operation, we began to carefully review proposed transfers of particular weapons to Israel that might be used in Rafah. This began in April.
“As a result of that review, we have paused one shipment of weapons last week. It consists of 1,800 2,000lb bombs and 1,700 500lb bombs,” the unnamed official added.
“We are especially focused on the end-use of the 2,000lb bombs and the impact they could have in dense urban settings as we have seen in other parts of Gaza. We have not made a final determination on how to proceed with this shipment.”
The official also said that “for certain other cases at the State Department, including JDAM [Joint Direct Attack Munition] kits, we are continuing the review.
None of these cases involve imminent transfers – they are about future transfers”. The official stressed that the shipments were unrelated to last month’s landmark $17bn military aid package, but had been drawn from “previously appropriated funds”.
The larger 2,000lb bombs are most likely to be Mk-84s or possibly BLU-109s – or both.
The former is a cheap, general purpose munition and the latter a penetration bomb designed for use against hardened or underground targets.
Both can be fitted with JDAM kits that deliver precision capability using satellite navigation. Laser guidance kits can also be fitted.
These bombs can be made to be very accurate, down to just a few metres.
But in a dense, urban environment like Gaza the risk of so-called “collateral damage” is high. And that is where the concern lies. The smaller 500lb bombs can also be fitted with guidance units dropped from jets.
We do not know exactly how Israel uses these weapons, but media posts from the Israeli Air Force frequently show F-16 and F-15 jets loaded with JDAMs for strikes.
It is worth remembering that such weapons would not just be used in Gaza but also targets in southern Lebanon belonging to the Iran-backed group Hezbollah, which has been involved in almost daily cross-border exchanges of fire with Israeli forces since the start of the Gaza war.