All areas of the Gaza Strip will receive medical supplies and fuel and cooking gas during the cease-fire, according to Hamas.

In a statement, Hamas said Israeli planes will stop flying over the southern Gaza Strip entirely during the cease-fire. Planes will stop flying over the northern Gaza Strip for six hours a day during the cease-fire.

Israel confirmed that it has received a list of hostages who will be released and officials are in contact with the hostages' families.

The Qatar Foreign Ministry announced that the cease-fire will begin on Friday at 7 a.m. local time and will last for four days.

The first hostages will be released at 4 p.m. local time, according to Dr. Majid bin Mohammed Al Ansari, the Qatar Foreign Ministry's spokesperson. Thirteen women and children from the same families will be among the first to be released.

Fifty hostages will be released over four days, Qatar said.

The Palestine Red Crescent Society has accused Israeli authorities of arresting the head of an ambulance service in the Gaza Strip, among other medical staff, during the evacuation of patients and the injured from Al-Shifa Hospital.

"We are deeply concerned about our colleague Awni Khattab, director of the Khan Yunis Ambulance Center, who was arrested yesterday evening and taken to an unknown destination, while a convoy evacuating the wounded from Al-Shifa Hospital passed through the barrier that separates the northern Gaza Strip from its southern one," the PRCS said in a statement on Thursday.

"We hold the [Israeli] occupation authorities fully responsible for the safety of our colleague Khattab, and we demand the immediate release of him and all the medical teams who were detained," the PRCS added. "We call on the international community to provide urgent protection for medical personnel, in accordance with international humanitarian law, as humanitarian and medical personnel must not be a target under any circumstances."

There was no immediate confirmation or comment from the Israel Defense Forces, which has been conducting a ground raid of Al-Shifa Hospital in Gaza City for days. However, the IDF confirmed earlier Thursday that the director of Al-Shifa Hospital, Dr. Muhammad Abu Salamiya, was apprehended for questioning amid accusations that “there was extensive Hamas terrorist activity” at Gaza's largest medical complex while “under his management” -- claims which Hamas denies.

-ABC News' Nasser Atta and Morgan Winsor

The Israel Defense Forces and the Israel Securities Authority has confirmed the arrest of the director of Al-Shifa Hospital, the largest medical complex in the Gaza Strip.

"The director of the Shifa Hospital in the Gaza Strip was apprehended and transferred for ISA questioning following evidence showing that the Shifa Hospital, under his direct management, served as a Hamas command and control center," the IDF and the ISA said in a joint statement on Thursday. "The Hamas terror tunnel network situated under the hospital also exploited electricity and resources taken from the hospital. In addition, Hamas stored numerous weapons inside the hospital and on the hospital grounds."

The IDF and the ISA alleged that Hamas militants "sought refuge within the hospital, some of them taking hostages from Israel with them," in the wake of the Oct. 7 attack. The IDF and the ISA also claimed that a "pathological report" confirms 19-year-old Israeli soldier Noa Marciano, who was taken hostage by Hamas on Oct. 7, was killed on the premises of Al-Shifa Hospital.

"In the hospital, under his management, there was extensive Hamas terrorist activity," the IDF and the ISA said of the Al-Shifa Hospital director, Dr. Muhammad Abu Salamiya. "Findings of his involvement in terrorist activity will determine whether he will be subject to further ISA questioning."

Hamas, the militant group that rules Gaza, has denied Israel's allegations that it has placed its command centers under Al-Shifa and other hospitals in the enclave and is deliberately sheltering behind Palestinian civilians.

-ABC News' Dana Savir and Morgan Winsor

President Joe Biden said Friday that the release of 24 hostages held by Hamas in Gaza is "just the beginning" of a plan to free 50 of the more than 230 captives over four days.

“It's only a start, but so far it's gone well,” Biden said in a televised address from Nantucket, Massachusetts, where he and first lady Jill Biden are vacationing.

He said Friday's hostage release is part of a deal "reached by extensive U.S. diplomacy, including numerous calls I've made from the Oval Office to leaders across the region," including calls with Israeli Prime Minister Benjamin Netanyahu, Egyptian President Abdel Fattah El-Sisi and the emir of Qatar.

“All of these hostages have been through a terrible ordeal, and this is the beginning of a long journey of healing for them,” Biden said. “Today has been a product of a lot of hard work and weeks of personal engagement.”

Biden said that under the deal, more hostages would be released over the next three days with 50 being "our goal." But he added, "We also will not stop until we get these hostages brought home and an answer to their whereabouts.”

The president said U.S. officials do not know when Americans -- including two women and 4-year-old Abigail Edan, whose parents were killed by Hamas terrorists -- will be among those that are released or their conditions. He added, “We expect it to occur” and that it’s his “hope and expectation” that it “will be soon.”

Biden said the four-day cease-fire that was negotiated for the release of the hostages will allow time to "accelerate and expand humanitarian assistance going into Gaza."

Speaking of the children freed on Friday, one just 2 years old, Biden said, “The teddy bears waiting to greet those children at the hospital are a stark reminder of the trauma these children have been through at such a very young age.”

-ABC News' Justin Gomez