The parents of an American-Israeli hostage in Gaza told their son to "stay strong" and "survive" after Hamas released a video as proof he was alive.
Hersh Goldberg-Polin (23) is seen in a short clip without the lower part of his left arm.
The video is undated, but he says he has been in captivity for almost 200 days.
In response to the video, his mother and father called for more to be done to reach a new deal to free the hostages.
They appealed to Israel, Hamas and the mediators - America, Egypt and Qatar - to reach an agreement so that everyone can be reunited with "loved ones and to end the suffering in the region".
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Speaking under duress in a video posted on Hamas' Telegram channel on Wednesday, Goldberg-Polin said he needed medical attention.
He also criticized the Israeli government's attempts to arrange the release of the hostages.
Intermediate negotiations, which lasted for weeks, did not lead to an agreement.
Hamas rejected the latest proposal for a six-week ceasefire in exchange for the release of 40 of the remaining 113 hostages.
At least 30 hostages are believed to be dead.
Israel appears to be pressing ahead with plans to attack Rafah, in southern Gaza, despite warnings that it could have catastrophic humanitarian consequences for displaced Palestinians living in shelters in the area.
Hersh Goldberg-Paulin was at the Supernova music festival on October 7, when Hamas attackers killed around 1.200 people and took 253 hostage, according to Israeli data.
Before Wednesday, Goldberg-Paulin was last seen alive in a Hamas video, showing him being loaded into a truck with part of his left arm missing.
In the new video, he said he was "fighting for his life with serious injuries all over his body" and that he needed immediate medical attention.
He also accused Israeli Prime Minister Benjamin Netanyahu and his government of "abandoning" the remaining hostages, criticizing the collapse of negotiations for their release.
"Do what is expected of you and bring us home," he said.
After this video was released, Goldberg-Polin's parents released their own video in response.
"Hersh, if you can hear this, we heard your voice today for the first time in 201 days.
"If you can hear us, we're saying, 'We love you, stay strong, survive,'" said mother Rachel Goldberg-Pauline.
His father, John Pauline, made a plea to all parties involved in the negotiations.
"Be brave, make an effort, seize the moment and reach an agreement so that we can all be with our loved ones again and to end the suffering in this region," he said.
Daniel Hagari, a spokesman for the Israel Defense Forces, said that "the psychological terror of the video is not just a reminder of what Hamas did on October 7."
"It's also a reminder of how sick this terrorist group is that terrorizes hostages and their families," he said.
More than 34.000 people have been killed in Gaza since October 7, according to Hamas' Ministry of Health.
The agreement, reached in November, freed 105 hostages, mostly women and children, in exchange for a week-long ceasefire and the release of about 240 Palestinians from prison.
Dozens of people, including friends of Goldberg-Polin, protested in front of the Israeli Prime Minister's residence in Jerusalem.
Many carried "Bring them home now" banners.
Police arrested at least two people and used water cannons against the protesters who blocked the streets, Israel's Haaretz newspaper reported.
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