A high-level Egyptian source denied Israeli reports about the existence of tunnels on the Egyptian border with Gaza, Egyptian state-run Al-Qahera News said.

The source dismissed the reports as “lies” promoted by Israel to "cover up its military failure." It added that there were "no communications with the Israeli side" regarding the allegations.

There has been no official comment from Cairo since the announcement.

Egypt has over the past decade destroyed hundreds of smuggling tunnels along its eastern border with Gaza as part of its fight against Islamist militants in its border Sinai region.

Egyptian officials have said a potential Israeli takeover of Philadelphi, a largely demilitarized buffer zone along the Gaza-Egypt border, could violate the 1979 peace deal between Egypt and Israel.

-ABC News' Ayat Al-Tawy

The damaged components of the U.S. pier built to funnel aid into Gaza are back at the Port of Ashdod undergoing repairs, a U.S. official confirmed to ABC News.

The system is expected to be back in operation on Gaza's coast within a week, the official said.

-ABC News' Matt Seyler

Two members of the Palestinian Red Crescent Society were killed in the bombing of an ambulance in Rafah as the Israel Defense Forces operation continues, according to the PRCS.

"The PRCS paramedics Haitham Tubasi and Suhail Hassouna were killed as a result of the Israeli occupation's direct bombing of a Palestine Red Crescent ambulance in the Tal Sultan area, west of Rafah, while they were performing their humanitarian duty," the PRCS said in a statement Wednesday.

The paramedics were heading to evacuate the wounded and martyrs in the Abu Al-Saeed roundabout area in Tal Al-Sultan, west of Rafah, according to the Gaza Health Ministry.

-ABC News' WIll Gretsky

Evidence indicates a weapon used by Israel in the Rafah strike -- that killed 50 people and injured 249 others -- on May 26 appears to be made by a U.S.-owned company, two weapons experts who reviewed photos and video of fragments at the site told ABC News.

Weapon fragments seen in video are consistent with a U.S.-made "small diameter bomb," which includes the GBU-39/B, or B/B. These types of SDB/GBU-39 weapons can carry a 37-pound warhead, consistent with statements from the IDF about what weapons were used in the strike, Trevor Ball, a former U.S. Army explosive ordinance disposal specialist, said.

"We used two small rockets, 17 kg warhead, that were fired from aircraft to hit, precisely. We've used this kind of ammunition before," Israel Defense Forces spokesman Lt. Col. Nadav Shoshani told ABC News when asked about what weapons were used in the strike.

Ball identified a series of numbers beginning with “81873" marked on one fragment seen in video reviewed by ABC News. This is the Commercial and Government Entity Code, or CAGE Code, assigned by the U.S. government to aerospace manufacturing company Woodward, based in Colorado, according to U.S. government records.

A second former U.S. military explosive ordinance disposal specialist confirmed the fragments were consistent with the GBU-39, but asked to not be named by ABC News.

All sales of GBU-39/B Small Diameter Bombs to foreign entities require the State Department’s approval, but a U.S. official says Israel may have also procured the munitions through direct commercial sales that don’t meet the value threshold -- $25 million in Israel’s case -- for congressional review and public notification.

In the days following the Oct. 7 attack, Israel rushed to back up its stockpiles, including its supply of the small diameter bombs by any available means, the official said. ABC News has not confirmed if the weapons Israel received after Oct. 7 were used in the May 26 Rafah strike.

When asked if the bombs used in the strike were provided by the U.S., deputy Pentagon press secretary Sabrina Singh said reporters needed to ask the Israelis during a briefing on May 28.

-ABC News' Chris Looft, Helena Skinner, Britt Clennett, Sohel Uddin, Luis Martinez, Matt Seyler, Shannon Crawford, Ellie Kaufman, Dana Savir, Camilla Alcini, Kerem Inal and Cindy Smith

An Egyptian border guard was killed in a shooting in the Rafah border area with Gaza, Egypt’s military spokesman said in a statement on Monday.

"The Egyptian armed forces, through the competent authorities, are investigating a shooting incident in the Rafah border area which led to the martyrdom of one of the security personnel on duty," the statement said.

The Israeli military had earlier reported an exchange of fire on the Egyptian border and said it was discussing the incident with Egypt.

“A few hours ago (Monday), a shooting incident occurred on the Egyptian border. The incident is under review and discussions are being held with the Egyptians,” the IDF said.

Initial investigations into an incident that killed an Egyptian border guard indicate the incident occurred while there was an exchange of fire between Israeli forces and "the Palestinian resistance," an Egyptian security source told Egypt’s state-affiliated Al Qahera News TV on Monday.

In October 2023, weeks after the war started, Israel said one of its military tanks mistakenly fired at an Egyptian position near the border with Gaza. Egypt said at the time that several army personnel were slightly injured.

Tensions between Egypt and Israel have escalated after Israeli forces earlier this month seized control of the Rafah border crossing, a key entry point for humanitarian aid. Egypt said it would not reopen its side of the crossing unless it is operated by Palestinians and accused Israel of preventing aid deliveries.

-ABC News' Ayat Al-Tawy