Families have spoken of the sheer panic of learning their loved ones may have been taken hostage by Hamas, after the militant group attacked Israel.

The Israeli military suggests dozens of people, including foreign nationals, have been taken as captives into Gaza. Here are some of their stories.

'I'm trying to stay calm'

The first inkling Yoni Asher had that his family were inside Gaza was by tracking his wife's mobile phone.

His wife Doron and their two children Raz, 5, and Aviv, 3, were staying with relatives close to the border with Gaza when the militants struck.

Yoni told the BBC: "Saturday, around 10:30 in the morning, was the last call when I spoke with my wife. She told me that terrorists from Hamas had entered the house.

"They were in the safe, secure room then the call got disconnected. Later on, I managed to locate her mobile and it was inside Gaza."

Later that day, his worst fears were seemingly confirmed when he recognised his family being briefly shown in a video of people being loaded on to the back of a truck.

"In the video I recognised my wife and my two daughters, my two little babies," he said.

"I don't know in what terms or what conditions they are held, but you know, the situation is getting much worse. "

For now, like other families, all Yoni can do is hope. "I'm trying to stay calm. I want to believe there is some contact between the diplomats negotiating or something, but we don't know anything - that is the hardest thing."

'There is hope to believe they're alive'

For Ido Dan, the horror of Saturday's events played out on his family's WhatsApp group.

"She's saying goodbye. She's sending this heart and saying: 'I love you all. I'm not sure we're going to survive this,'" Ido says, sobbing as he looks back through the torrent of messages.

His cousin Hadas, who lives in Nir Oz, a kibbutz next to Gaza, had been updating her family from within an air raid shelter, where she had run after sirens went off to warn of incoming rocket fire. Early in the morning, she had written that she could hear gunmen shouting in Arabic.

"Something scary is going on here," she told the group, describing the screaming of other kibbutz members. "She said: 'It's like a Holocaust here. They are killing everyone'," Ido says. "And then at 09:00 she got disconnected. Her battery ran out."

Hadas did survive - by wedging the door of her hideout closed. But by nightfall, it was clear that five family members were missing: two of Hadas's children and her ex-husband - their father- as well as her niece and her 80-year-old mother, Ido's aunt Carmella.

The main clue about what happened was a disturbing video which surfaced on social media. It appears to show Erez, Hadas's 12-year-old son, being taken by gunmen into Gaza.

"There is hope to believe they're alive," says Ido, who lives near Tel Aviv. But he is deeply fearful. "My aunt is out of her medicines," he tells me. "For the children, we don't know how they go to the restrooms, how they eat."

The family is trying to find out information from their contacts and have had little help from the Israeli authorities. "I don't blame anyone as it's really a singular situation," Ido says. "There is a real fog right now, but we can't wait for it to lift. Every hour matters."

With reports of hostage negotiations brokered by Qatar now taking place, Ido has a message for Hamas about his family: "Just get them out of this confrontation, it's not for kids, it's not for older people," he says.

"I don't think there are any war ethics that were not violated here. Even war has rules and ethics and limits."

'It sounds like a horror movie'

Noam Sagi said his heart sank when Palestinian media began broadcasting from in front of his 74-year-old mother's home, about 400m from the border with Gaza.

On Saturday afternoon, the Israeli Army entered grandmother-of-six Ada Sagi's property and found blood stains - but no sign of the elderly woman, he explained.

Speaking to BBC Radio 4, Mr Sagi - who lives in London - said his assumption was that his mother, who teaches Arabic, was among those kidnapped.

"We are talking about someone, 74 years old, who went into a safe room and [now] she is not there," he said.

"She is not on the dead list, she is not on the injured list, and it's a small community… 350 people max and they know each other, so they have gone through the process of identifying everyone."

The community are reporting that the elderly and the young have been abducted, according to Mr Sagi, who said there was no formal or official confirmation of his mother's whereabouts. He pointed out that she could not run far, following a recent hip replacement.

"It's somehow completely surreal, sounds like a horror movie, it's hard to compute," Mr Sagi continued.

"Just imagine a lovely, rural village here in the UK and people just going through their lives… and then you are just being snatched out of your house.

"It feels unreal… it feels inhumane… it is very upsetting to think that this is even possible. Even in war there are rules, and we are talking about men in their 20s and 30s that come into an old woman's house and snatch her and her neighbours."

He added that he was scared for his mother, who needs medication.

His wife Michal, who also spoke to the BBC, said Ada had allergies.

"Without her medicines, we don't know how long she will keep on," she said. "I'm trying not to get into the negative scenarios, they're difficult to imagine."

Mr Sagi, who believes he will see his mother again, said he had been expecting her in London next week for her 75th birthday.

He described her as a very strong, inspiring and phenomenal woman, adding that he trusted her to "deal with the situation".

'Nothing is left'

Sharone Lifschitz, who also lives in London, says her elderly parents were taken from the same community as Ada Sagi, close to Gaza.

"They [the militants] burned the houses to scare the people out," she said, adding that people had tried to take shelter from the attacks in a secure room.

"There has been a total decimation of the place. Nothing seemed to be left."

Like Ada Sagi, Ms Lifschitz's father speaks Arabic and spent his time in retirement driving Palestinians who needed medical treatment to hospital.

"He believed in humanity and he believed in making things work with everybody."

Ms Lifschitz said there were "a lot of forces" trying to ensure Israelis and Palestinians remained divided and that both sides needed to remember that the other is human.

"I hope for peace. I hope for their [her parents'] safe return."

'Unconscious in a car'

German tourist Shani Louk had been attending the festival near the Gaza border when Hamas militants stormed the area, opening fire and sending terrified partygoers fleeing through the desert.

Her mother, Ricarda, said she had seen a video of Shani after she was taken.

Holding up a picture of the twenty-something on her mobile phone, she said in a social media appeal that her daughter had been "kidnapped with a group of tourists in southern Israel by Palestinian Hamas".

"We were sent a video in which I could clearly see our daughter unconscious in the car with the Palestinians and them driving around the Gaza Strip," she said. "I ask you to send us any help or news. Thank you very much."

Another music festival attendee who is missing believed kidnapped is the Chinese-born Israeli citizen Noa Argamani, the South China Morning Post newspaper reports quoting the Israeli embassy in Beijing.

Unverified video footage shows the 25-year-old being ridden away on the back of a militant's motorbike screaming, "Don't kill me!"

'That's my grandma right there'

"She's an amazing grandmother, she's a very positive woman, a very funny woman," was how Adva Adar described her 85-year-old grandmother Yaffa Adar.

"That's my grandma right there!" she said in a Facebook post after seeing her paraded through the streets of Gaza in a golf cart.

In an interview for Sky News, Ms Adar said she was scared for her grandmother who did not have her medicine with her, adding that she did not know how long she could survive.

Missing Thais

A number of those said to have been kidnapped are Thai labourers working in an area close to the Gaza border stormed by Hamas militants.

Thailand's Foreign Ministry said 11 of its nationals were missing.

Wanida Maarsa told BBC Thai that her husband Anucha Angkaew - who had been working on an avocado farm for almost two years - was one of those taken captive by the militants.

He appeared in a video Hamas put out over the weekend. "[The man in the video] is absolutely him," she said.

"I have not been able to contact him since 02:00 Bangkok time [19:00 GMT on Friday]. I talked to him just before our daughter went to sleep," Ms Wanida added.

Another seven of the missing Thais have been named by the ministry as Pongsathorn (male), Komkrit Chombua (male), Kiattisak Patee (male), Manee Jirachart (male), Nuttaporn Ornkaew (male), Sasiwan Pankong (female) and Boonthom Pankong (male).