People in North Korea have told the BBC food is so scarce their neighbours have starved to death.
Exclusive interviews gathered inside the world's most isolated state suggest the situation is the worst it has been since the 1990s, experts say.
The government sealed its borders in 2020, cutting off vital supplies. It has also tightened control over people's lives, our interviewees say.
Pyongyang told the BBC it has always prioritised its citizens' interests.
The BBC has secretly interviewed three ordinary people in North Korea, with the help of the organisation Daily NK which operates a network of sources in the country. They told us that since the border closure, they are afraid they will either starve to death or be executed for flouting the rules. It is extremely rare to hear from people living in North Korea.
The interviews reveal a "devastating tragedy is unfolding" in the country, said Sokeel Park from Liberty in North Korea (LiNK), which supports North Korean escapees.
One woman living in the capital Pyongyang told us she knew a family of three who had starved to death at home. "We knocked on their door to give them water, but nobody answered," Ji Yeon said. When the authorities went inside, they found them dead, she said.
Ji Yeon's name has been changed to protect her, along with those of the others we interviewed.
A construction worker who lives near the Chinese border, whom we have called Chan Ho, told us food supplies were so low that five people in his village had already died from starvation.
"At first, I was afraid of dying from Covid, but then I began to worry about starving to death," he said.
North Korea has never been able to produce enough food for its 26 million people.
When it shut its border in January 2020, authorities stopped importing grain from China, as well as the fertilisers and machinery needed to grow food.
Meanwhile, they have fortified the border with fences, while reportedly ordering guards to shoot anyone trying to cross. T
his has made it nearly impossible for people to smuggle in food to sell at the unofficial markets, where most North Koreans shop.
A market trader from the north of the country, whom we have named Myong Suk, told us that almost three-quarters of the products in her local market used to come from China, but that it was "empty now".
She, like others who make their living selling goods smuggled across the border, has seen most of her income disappear. She told us her family has never had so little to eat, and that recently people had been knocking on her door asking for food because they were so hungry.
From Pyongyang, Ji Yeon told us she had heard of people who had killed themselves at home or disappeared into the mountains to die, because they could no longer make a living.
