So far the Gaza ceasefire is holding, but calls are getting louder for Hamas to hand over more hostages' remains, and for Israel to allow in more aid.

Humanitarian aid workers told ABC News that they will face several challenges in delivering aid to Gaza. Israeli authorities have limited the amount of aid that can enter the strip, and destroyed roads and neighborhoods make it difficult to reach areas of the enclave.

Hamas delivered four coffins to Israel late Tuesday, each thought to contain the remains of Israeli captives held in Gaza. But on Wednesday, the Israel Defense Forces (IDF) disclosed that forensic tests at the National Institute of Forensic Medicine determined that “the fourth body handed over

Israel accused Hamas of violating a days-old ceasefire agreement with the slow release of the remains of dead hostages.

Former President Joe Biden and Antony Blinken each took some credit Monday for President Donald Trump's Israel-Hamas cease-fire deal, arguing it followed groundwork laid by the Biden administration.

Trump gave an hour-long speech to the Israeli parliament as hostages were freed and the Palestinian prisoner release began. Here are the key moments.

After speaking in Israel, Trump traveled to Egypt for an international "peace summit" with more than 20 world leaders on what's next for Gaza.

The United Nations is seeking a dramatic boost in humanitarian aid for Gaza, saying the hundreds of relief trucks cleared to enter the devastated enclave under a ceasefire were nowhere near the thousands needed to ease a humanitarian disaster.