Remains of American Israeli hostage among 3 bodies returned by Hamas, IDF says

The International Committee of the Red Cross called Hamas' alleged staging of the discovery of a body in Gaza while Red Cross observers were in attendance on Monday "unacceptable."

The Israel Defense Forces released a video that it said shows Hamas staging the discovery of a hostage body in Gaza.

"It is unacceptable that a fake recovery was staged, when so much depends on this agreement being upheld and when so many families are still anxiously awaiting news of their loved ones," the ICRC said in the statement on Tuesday.

ICRC observers accompanied Hamas earlier this week to provide any needed technical guidance in recovery efforts, but the ICRC does not participate in searching for the deceased or in physical recovery of remains per international law.

"The ICRC is raising its concerns directly with the parties," the organization added.

Israeli authorities cited this as one of the reasons for conducting strikes in Gaza on Tuesday, threatening the fragile ceasefire in place.

-ABC News' Cindy Smith

Hamas said it had "no connection" to the shooting incident in Gaza earlier Tuesday, in a statement.

This is the incident Israeli authorities said led to the decision for Israeli forces to conduct strikes in Gaza on Tuesday.

Hamas called Israel's decision to strike parts of Gaza on Tuesday a "blatant violation" of the ceasefire agreement," and said it was one of a "series of violations" committed by Israel in recent days.

Hamas added they are committed to the ceasefire and called on mediators to take "immediate action" to pressure Israel to adhere to the terms of the agreement.

-ABC News' Diaa Ostaz

Israeli Prime Minister Benjamin Netanyahu made the decision to conduct strikes in Gaza with the Israeli Defense Forces and then informed President Donald Trump before the action was taken, an Israeli official and a U.S. official confirmed to ABC News.

-ABC News' Jordana Miller and Anne Flaherty

Two explosions were heard coming from the eastern areas of Deir al Balah in the middle of the Gaza Strip in the past hour. ABC News does not know the source of these explosions at this time.

There has been no official word from either party -- Israel or Hamas -- on any action on the ground in Gaza.

Israeli Prime Minister Benjamin Netanyahu announced that strikes would resume on Gaza earlier on Tuesday.

Israel decided to carry out strikes in Gaza because of an attack on Israel Defense Forces troops in the IDF-controlled area of Gaza, east of the yellow line, on Tuesday, and for "violating the agreement," to return the remains of all the dead hostages still being held in Gaza, Israeli Defense Minister Israel Katz said in a statement Tuesday.

"The attack on IDF soldiers in Gaza today by the Hamas terrorist organization is crossing a bright red line to which the IDF will respond with great force," Katz said in the statement, originally in Hebrew.

"Hamas will pay with compound interest for attacking the soldiers and violating the agreement to return the fallen hostages," he added.

As a part of the ceasefire deal, the IDF withdrew to an established yellow line in Gaza. IDF troops control parts of Gaza east of the yellow line -- at these borders, the IDF still controls more than 50% of Gaza.

Hamas attacked IDF troops in this area of Gaza on Tuesday, violating of the ceasefire agreement, two Israeli officials told ABC News.

Israeli authorities were also particularly aggravated after the remains returned by Hamas via the Red Cross on Monday night were identified as a hostage whose remains had previously been found in Gaza by IDF troops, one Israeli military official said.

The military official said one of the IDF’s surveillance cameras captured footage they say shows Hamas staging the discovery of a body in Gaza in front of the Red Cross on Monday.

-ABC News’ Diaa Ostaz and Jordana Miller