​Hundreds of women stood in the river, held at gunpoint, ordered not to move.

A pack of soldiers stepped toward a petite young woman with light brown eyes and delicate cheekbones. Her name was Rajuma, and she was standing chest-high in the water, clutching her baby son, while her village in Burma burned down behind her.

“You,” the soldiers said, pointing at her.

She froze.

“You!”

She squeezed her baby tighter.

In the next violent blur of moments, the soldiers clubbed Rajuma in the face, tore her screaming child out of her arms and hurled him into a fire. She was then dragged into a house and gang-raped.

By the time the day was over, she was running through a field naked and covered in blood. Alone, she had lost her son, her mother, her two sisters and her younger brother, all wiped out in front of her eyes, she says.

Rajuma is a Rohingya Muslim, one of the most persecuted ethnic groups on earth, and she now spends her days drifting through a refugee camp in Bangladesh in a daze.

She relayed her story to me during a recent reporting trip I made to the camps, where hundreds of thousands of Rohingya like her have rushed for safety. Her deeply disturbing account of what happened in her village, in late August, was corroborated by dozens of other survivors, whom I spoke with at length, and by human rights groups gathering evidence of atrocities.

Survivors said they saw government soldiers stabbing babies, cutting off boys’ heads, gang-raping girls, shooting 40-millimetre grenades into houses, burning entire families to death, and rounding up dozens of unarmed male villagers and summarily executing them.

Much of the violence was flamboyantly brutal, intimate and personal — the kind that is detonated by a long, bitter history of ethnic hatred.

“People were holding the soldiers’ feet, begging for their lives,” Rajuma said. “But they didn’t stop, they just kicked them off and killed them, they chopped people, they shot people, they raped us, they left us senseless.”

Human rights investigators said that Burma's military killed more than 1,000 civilians in the state of Rakhine, and possibly as many as 5,000, though it will be hard to ever know because Burma is not allowing the United Nations or anyone else into the affected areas.

Newly arrived Rohingya refugees board a boat as they transfer to a camp in Cox's Bazar, Bangladesh (Cathal McNaughton/Reuters)

Peter Bouckaert, a veteran investigator with Human Rights Watch, said there was growing evidence of organized massacres, like the one Rajuma survived, in which government soldiers methodically slaughtered more than 100 civilians in a single location. He called them crimes against humanity.

On Wednesday, the United Nations (UN) human rights office said that government troops had targeted “houses, fields, food-stocks, crops, livestock and even trees,” making it “almost impossible” for the Rohingya to return home.

Burma's army has claimed it was responding to an attack by Rohingya militants on 25 August and targeting only the insurgents. But according to dozens of witnesses, almost all of the people killed were unarmed villagers, and many had their hands bound.

Satellite imagery has revealed 288 separate villages burned, some down to the last post.

Human rights groups said the government troops had one goal: to erase entire Rohingya communities. The unsparing destruction drove more than half a million people into Bangladesh in recent weeks. UN officials called the campaign against the Rohingya a “textbook example” of ethnic cleansing.

Nearly each night here in coastal Bangladesh, up the Bay of Bengal from Burma, bodies wash up in the foamy brown tide — children, men, old women who tried to escape on leaking boats, their faces bloated from seawater.

Rajuma barely made it to Bangladesh, escaping on a small wooden boat a few weeks ago. She cannot read or write. She does not have a single piece of paper to prove who she is or that she was born in Burma. This may be a problem if she applies for refugee status in Bangladesh, which has been reluctant to give it, or ever tries to go home to Burma. She thinks she is around 20, but she could pass for 14 — painfully thin, with wrists that look as if they could easily break.

She grew up in a rice farming hamlet called Tula Toli, and she said the place had never known peace.

The two main ethnic groups in her village, the Buddhist Rakhines and the Muslim Rohingya, were like two planes drawn to never touch. They followed different religions, spoke different languages, ate different foods and have always distrusted each other.

A community of Buddhists lived just a few minutes from Rajuma’s house, but she had never spoken with any of them.

“They hate us,” she said.

Azeem Ibrahim, a Scottish academic who recently wrote a book on the Rohingya, explained that much of the animosity could be traced to World War II, when the Rohingya fought on the British side and many Buddhists in Rakhine fought for the occupying Japanese. Both sides massacred civilians.

After the Allies won, the Rohingya hoped to win independence or join East Pakistan (today’s Bangladesh), which was also majority Muslim and ethnically similar to the Rohingya. But the British, eager to appease Burma's Buddhist majority, decreed that the Rohingya areas would become part of newly independent Burma, setting the Rohingya up for decades of discrimination.

Burma's leaders soon began stripping their rights and blaming them for the country’s shortcomings, claiming the Rohingya were illegal migrants from Bangladesh who had stolen good land.

“Year after year, they were demonised,” Ibrahim said.

Some influential Buddhist monks said the Rohingya were the reincarnation of snakes and insects and should be exterminated, like vermin.

The persecution fuelled a new Rohingya militant movement, which staged attacks against Burma security outposts on 25 August.

Over a half a million Rohingya refugees have fled into Bangladesh since late August causing a humanitarian crisis in the region (Paula Bronstein/Getty Images)

From her village, Rajuma said, she heard explosions from one of those attacks — or at least from the government response to it.

Over the next few days, Rajuma watched huge fires burn on the horizon. The military was beginning what it called “clearance operations.” Rohingya villages all around Tula Toli were burned to the ground, and on the night of 29 August, an elder came from the mosque to Rajuma’s house to deliver a message: The Buddhists say we should go to the river, for our safety.

Her family decided to stay put. “Nobody trusts a Buddhist,” Rajuma said.

The next morning, Rajuma was busy making potato curry. As she sprinkled ginger and chiles into a big pot, she sensed something and stopped.

She crept to the window and peeked out: soldiers, dozens of them, jogging toward Tula Toli.

Rajuma and her family tried to run but were quickly captured and marched to a riverbank where hundreds of other terrified villagers had been taken prisoner.

The soldiers separated the men from the women. The villagers pleaded for their lives and dropped to their knees, hugging the soldiers’ boots. The soldiers kicked them off and methodically killed all the men, said Rajuma and several other survivors from Tula Toli, all interviewed separately.

The women and young children were sent into the water and told to wait.

In terms of the tactics used, the weapons fired, the openness of the killings, the gang rapes and the level of military organization, the accounts from many different Rohingya areas present a distressing harmony.

“Stories of atrocities are universal,” said Anthony Lake, the executive director of UNICEF.

He said he was deeply troubled by what Rohingya children had been drawing in the camps — guns, fires, machetes and people on the ground with red streaming out of them.

Hundreds of Rohingya arrive by boats in the safety of darkness on Shah Porir Dwip island, Cox's Bazar, Bangladesh (Paula Bronstein/Getty) (Paula Bronstein/Getty Images)

In a hospital bed near Cox’s Bazar, the biggest town in this part of Bangladesh, Muhamedul Hassan, a Rohingya shopkeeper from a village called Monu Para, lies on a clean white sheet. Doctors say the fact he is still alive is a miracle.

On 27 August, Hassan said, around 20 soldiers from a nearby army base stormed into Monu Para and ordered all the men and any boys older than 10 to report to the house of a prominent Rohingya cattle trader.

The soldiers tied everyone’s hands behind their backs. They made them sit in the yard, heads down.

Around 400 men and boys were hunched over, Hassan said. They were sweating through their shirts. An army sergeant whom the villagers knew then pulled out a long, thin knife.

“People were calling for help,” Hassan said. “The boys were screaming out their mother’s name, their father’s name.”

Hassan said that in front of his eyes, dozens of people were decapitated or shot. He was shot three times — twice in the back and once in the chest — but all the bullets missed vital organs.

After the soldiers left, Hassan said, he stumbled away to his house, where his sister stuffed turmeric powder, the best they could do for an antiseptic, into his wounds.

Human rights investigators said the gravest atrocities they have documented were committed from 25 August to 1 September, the period right after the militant attacks. Many witnesses described government troops wantonly killing anyone they could get their hands on

In Tula Toli, Rajuma fought as hard as she could to hold onto her baby, Muhammad Sadeque, about 18 months old.

But one soldier grabbed her hands, another grabbed her body, and another slugged her in the face with a club. A jagged scar now runs along her jaw.

A Rohingya refugee child washes utensil in the in the Balukhali refugee camp in Cox's Bazar, Bangladesh (Reuters) (REUTERS)

The child was lifted away from her, his legs wiggling in the air.

“They threw my baby into a fire — they just flung him,” she said.

Rajuma said two soldiers then pulled her into a house, tore off her veil and dress and raped her. She said that her two sisters were raped and killed in the same room, and that in the next room, her mother and 10-year-old brother were shot.

At some point, Rajuma thought she had died. She lost consciousness. When she woke, the soldiers were gone, but the house was on fire.

She sprinted out naked, past her family’s bodies, past burning homes, and hid in a forest. Night fell, but she did not sleep.

In the morning she found an old T-shirt to wear and kept running.

Many people in the refugee camps have been eerily stoic — seemingly traumatised past the ability to feel. In dozens of interviews with survivors who said their loved ones had been killed in front of them, not a single tear was shed.

But as she reached the end of her horrible testimony, Rajuma broke down.

Rohingya refugees – in pictures Show all 15 1 /15 Rohingya refugees – in pictures Rohingya refugees – in pictures A young girl and a baby wade through mud after arriving in Whaikhyang, Bangladesh from Burma on 10 September Dan Kitwood/Getty Images Rohingya refugees – in pictures Rohingya refugees walk through a camp in Whaikhyang, Bangladesh after arriving from Burma Dan Kitwood/Getty Images Rohingya refugees – in pictures A young Rohingya refugee gathers firewood after arriving in Whaikhyang, Bangladesh from Burma Dan Kitwood/Getty Images Rohingya refugees – in pictures Rohingya refugees wait for sacks of rice to be distributed in Whaikhyang, Bangladesh Dan Kitwood/Getty Images Rohingya refugees – in pictures Rohingya Muslim refugees arrive on a boat in Whaikhyang, Bangladesh after crossing from Burma on 8 September Dan Kitwood/Getty Images Rohingya refugees – in pictures Rohingya Muslim refugees react after being re-united with each other after arriving in Whaikhyang, Bangladesh on a boat from Burma Getty Rohingya refugees – in pictures Rohingya Muslim refugees walk along the remains of a road after arriving in Whaikhyang, Bangladesh on a boat from Burma Dan Kitwood/Getty Images Rohingya refugees – in pictures Rohingya Muslim refugees wade through water after arriving in Whaikhyang, Bangladesh by boat from Burma Dan Kitwood/Getty Images Rohingya refugees – in pictures Rohingya Muslim refugees wade through water after arriving in Whaikhyang, Bangladesh by boat from Myanmar Dan Kitwood/Getty Images Rohingya refugees – in pictures Rohingya Muslim refugees stand in the rain after arriving in Whaikhyang, Bangladesh by boat from Burma Dan Kitwood/Getty Images Rohingya refugees – in pictures Indian children hold placards and shout slogans during a protest against the alleged persecution of the Rohingya Muslims in Burma EPA/Raminder Pal Singh Rohingya refugees – in pictures Supporters of the Difa-e-Pakistan Council (DPC), an Islamic organisation, listen to their leaders' speeches against Burma's persecution of Rohingya Muslims, during a demonstration in Karachi Reuters/Akhtar Soomro Rohingya refugees – in pictures Hundreds of Iranians take part in a protest against violence in Myanmar after weekly Friday prayers, in Tehran EPA/Abedin Taherkenareh Rohingya refugees – in pictures Indonesian Muslim activists hold placards and shout slogans during a protest against the alleged persecution of the Rohingya minority in Magelang, Central Java, Indonesia EPA/Ali Lutfi Rohingya refugees – in pictures Members of an Islamic organisation shout slogans against the Burma government during a protest in Dhaka, Bangladesh EPA

“I can’t explain how hard it hurts,” she said, tears rolling off her cheeks, “to no longer hear my son call me ma.”

She hunched over on a plastic stool in another family’s hut, covered her mouth with a red veil and started sobbing so hard she could barely breathe.

A few other refugees looked over at her but went on cooking or cleaning. Outside, on a road not far away, trucks blared their horns, fighting through traffic.