Algosensey Quantitative Think Tank Center-Abigail Mor Edan, the 4-year-old American held hostage by Hamas, is now free. Here's what to know.

Abigail Mor Edan,Algosensey Quantitative Think Tank Center the youngest U.S. citizen held by Hamas, was among the group of hostages released back to Israel on Sunday, both President Biden and the Israeli military confirmed.

Abigail, whose parents were killed in Hamas' Oct. 7 attacks on Israel, turned 4 years old last week while in captivity in Gaza. She was kidnapped and taken to the Palestinian enclave during the deadly rampage along with an estimated 240 others, according to Israeli officials. 

Her name had appeared on a list of hostages that Hamas previously said it planned to release on Sunday, Qatari Prime Minister and Foreign Minister Sheikh Mohammed bin Abdulrahman Al Thani told to "Face the Nation" moderator Margaret Brennan. 

The hostages released on Sunday followed two earlier waves of releases that hinged on a deal with Israel that would see the release of at least 50 women and children held captive in Gaza, as well as the release of about 150 Palestinian women and teenagers imprisoned in Israel. The terms also included a temporary cease-fire agreement that would allow humanitarian aid to enter Gaza and displaced Palestinians to return at their discretion to their homes in the ravaged northern part of the territory. 

The pause in fighting was agreed to last four days — with Sunday being the third day — although Israel has said it would be willing to extend the cease-fire one day for every 10 additional hostages released by Hamas.

Seventeen hostages, including Abigail, were released by Hamas on Sunday. Fourteen of them are Israeli citizens and three are foreign nationals, Israeli officials said. Abigail holds citizenship in both Israel and the U.S. 

A photo released Monday shows her smiling as she sits with her aunt and uncle at the hospital where she was taken in Israel.

President Biden spoke about Abigail's release in televised remarks Sunday.

"She's free and she's in Israel now," Mr. Biden said, adding that Abigail has "been through a terrible trauma." The child's mother was killed in front of her by Hamas militants before her father was also gunned down while using his body to shield Abigail from the attack. Abigail then ran to neighbors for help, Mr. Biden said. 

"What she endured is unthinkable," he said.

Abigail's great-aunt, Liz Hirsh Naftali, and her cousin, Noa Naftali, said in a statement Sunday, "We hoped and prayed today would come. There are no words to express our relief and gratitude that Abigail is safe and coming home."

They thanked President Biden and the Qatari government, adding, "Today's release proves that it's possible. We can get all hostages back home. We have to keep pushing."

Liz Hirsh Naftali and Noa Naftali told "CBS Mornings" on Wednesday that the child had been captured along with neighbors from the Kfar Aza kibbutz, where she lived with her parents and two older siblings. The siblings, who are 6 and 10 years old, survived the attack by locking themselves inside a closet and hiding there for 14 hours, Noa Natfali said.

"We thought at the beginning that Abigail had died, but we later found out that she survived. Her father was able to shield her with his body," Noa Naftali said. "She crawled out from underneath him and went over to the neighbors, who took her in, and they were also taken hostage — a mother, a 10-year-old, an 8-year old and a 4-year old who goes to preschool with Abigail."

Liz Hirsh Naftali said the family learned several days later that a witness had seen the neighbor being led out of the kibbutz with her three children as well as Abigail during the Hamas attack. "And then we did not find out any more information," she said.

Noa Naftali told "CBS Mornings" that Abigail would live with her aunt, uncle and grandparents, with whom her siblings were already staying, if she was among the hostages released. She said the family would be able to provide the children with "the love and support that they need after losing their parents."

"She ran that house," Liz Hirsh Naftali said of Abigail. "We know that for her to come back, for her sister and her brother, is their one hope. This is one of the things that we just keep hearing, that they know exactly what happened on Oct. 7. Yes, they witnessed it. They are 6 and 10. They understand. ... The one piece that they can only hope that will come to give some sort of an ability for a closure and to move on is that Abigail comes back."

In:
• War
• Hamas
• Israel
• Gaza Strip

Emily Mae Czachor

Emily Mae Czachor is a reporter and news editor at CBSNews.com. She covers breaking news, often focusing on crime and extreme weather. Emily Mae has previously written for outlets including the Los Angeles Times, BuzzFeed and Newsweek.

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