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

The Israel Defense Forces said in a Wednesday morning statement that it had resumed adherence to the ceasefire in Gaza "following a series of significant strikes in which dozens of terror targets and terrorists were attacked."

"The IDF will continue to enforce the agreement and respond forcefully to any violation," the statement said.

The Hamas-run Civil Defence agency said that at least 91 Palestinians were killed in the renewed strikes across Gaza.

The bombardment came after one Israeli soldier was killed in an attack in the southern Gaza city of Rafah on Tuesday. Hamas denied involvement in the incident.

President Donald Trump said he backs Israel's strikes on Gaza, arguing the move was "retribution" for a reported attack on Israeli troops -- but he's said he's confident the ceasefire deal will hold.

Trump said "Israel should hit back" following strikes on Gaza after Israel accused Hamas of violating the ceasefire agreement.

Still, the president remained confident that the ceasefire would hold, repeating his threat that if Hamas is "not good, they’re going to be terminated."

"Nothing's going to jeopardize that," Trump said, referring to the ceasefire. "You have to understand, Hamas is a very small part of peace in the Middle East, and they have to behave. They're on the rough side, but they said they would be good. And if they're good, they're going to be happy, and if they're not good, they're going to be terminated. Their lives will be terminated. And they understand that."

He added, "If we have to, we'll take out Hamas very easily, and that'll be the end of Hamas. We would rather not. We made a deal with them where they were going to behave, and they have to behave. If they don't behave, they get taken out."

-ABC News' Lalee Ibssa

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