From squalid refugee camps in Bangladesh, Rohingya who fled a brutal Myanmar military crackdown are calling on Aung San Suu Kyi to acknowledge the mass atrocities as she defends her country against genocide charges at the UN's top court.

The Nobel peace laureate arrived Tuesday at the International Court of Justice in The Hague to lead the defence against claims brought by Gambia that Myanmar's military tried to systematically wipe out the Muslim minority in 2017.

The violence sparked a mass exodus of some 740,000 Rohingya to refugee settlements in Bangladesh border towns, where survivors are still haunted by the rape and murder of loved ones by soldiers and vigilante mobs.

Dildar Begum, with her daughter, says Myanmar soldiers killed her husband and two young sons
Dildar Begum, with her daughter, says Myanmar soldiers killed her husband and two young sons AFP / Munir UZ ZAMAN

"Suu Kyi cannot deny anything. The international community must listen to our voice because we are the real victims," Sayed Ulla, a Rohingya leader, told AFP at one of the camps.

"I want to see the convicts go to the gallows. They killed us mercilessly. I won't get back my family," added widow Saida Khatun, who witnessed her parents, husband and three children being slaughtered.

"Only seeing them (perpetrators) being punished for their deeds will make me happy."

Rohingya children play at at Jamtola refugee camp in Ukhia. Nearly one million Rohingya live in squalid camps in Bangladesh after fleeing the Myanmar military crackdown
Rohingya children play at at Jamtola refugee camp in Ukhia. Nearly one million Rohingya live in squalid camps in Bangladesh after fleeing the Myanmar military crackdown AFP / MUNIR UZ ZAMAN

Widow Dildar Begum told AFP her village of Tula Toli was razed and two of her children killed.

Revealing scars she said were caused by soldiers smashing her head with boots and rifle butts after raping her, Begum recalled how her husband and two sons, aged one and five, were hacked to pieces.

"I still can hear my sons' voices in my dreams cursing me as I failed to save them," the 35-year-old said, breaking down in tears.

Rohingya fleeing the violence in Myanmar head into Bangladesh in this picture from October 17, 2017. Gambia has brought genocide charges at the ICJ over the military crackdown
Rohingya fleeing the violence in Myanmar head into Bangladesh in this picture from October 17, 2017. Gambia has brought genocide charges at the ICJ over the military crackdown AFP / MUNIR UZ ZAMAN

UN investigators have concluded that the 2017 violence amounted to genocide, with Doctors Without Borders (MSF) estimating that at least 6,700 Rohingya were killed in the first month of the crackdown alone.

The case brought by the tiny west African nation of Gambia is the first international legal attempt to bring Myanmar to justice over the crisis.

Gambia, acting on behalf of the 57-nation Organisation of Islamic Cooperation, on Tuesday will ask the ICJ to take emergency measures to halt Myanmar's "ongoing genocidal actions" against the Rohingya.

Myanmar's military has insisted its crackdown was needed to root out Rohingya militants who attacked border police posts in 2017.

Suu Kyi has kept silent over the plight of the minority and defended the same generals who once kept her under house arrest for 15 years.

The hearing comes amid growing impatience in Dhaka over the presence of the refugees, who now number nearly one million, after two failed attempts to voluntarily repatriate them back to Myanmar's Rakhine state.

Ahead of Suu Kyi's ICJ appearance, hundreds of refugees gathered at one of the camps on Tuesday morning, chanting "Gambia, Gambia" and raising their fists.

"We prayed and chanted slogans for Gambia for filing the case against Myanmar," one refugee, who asked to remain anonymous, told AFP after the rally.

"We hope we'll get justice."