It was August 28, and like any other Monday for brothers Hussain and Mufisa. The two boys, aged nine and ten, waved goodbye to their parents and left for school in their village in Myanmar's Rakhine State.
When they returned, their childhood home was in flames and their parents were nowhere to be found.
They followed their neighbours into the nearby forest, where they were told their parents, Rohingya Muslims, had died at the hands of the Myanmar army in an attack on the village of Chin Khali.
"We are very sad without our parents and feel very lonely," Hussain said, with a vacant expression, in the Kutupalong camp across the border in Bangladesh. Beside him stood his brother, his bare arms folded defensively.
With their home torched and parents dead, the two brothers were forced to flee with the other villagers, carrying nothing but their schoolbooks.
After five days walking over jungled hills and across rivers the boys arrived in Bangladesh where they were abandoned by their neighbours and left to sleep on the side of the road.
They are not the only children to have been orphaned or separated from their families in the explosion of violence in Myanmar's western Rakhine State.
Over 410,000 Rohingya Muslims have fled a Myanmar military offensive that began after a series of guerilla attacks on August 25 on security posts and an army camp in which about a dozen people were killed.
Numerous Rohingya villages in the north of Rakhine have been torched but authorities in Buddhist-majority Myanmar have denied that security forces or Buddhist civilians set the fires. They blame the insurgents, and say 30,000 non-Muslim villagers were also displaced.
The United Nations children's agency, Unicef, has so far identified 1,312 unaccompanied or separated Rohingya children among the latest arrivals in Bangladesh - a number they fear will increase over the coming days, Jean Lieby, head of child protection at Unicef Bangladesh, said by phone on Monday.
Unicef estimates that an "unprecedented" 60% of new refugees in Bangladesh are children.
Trafficking risk
Bangladesh was recently downgraded to a Tier 2 "Watch List" country in the US State Department's annual Trafficking in Persons Report, reflecting increased concerns about government efforts to combat trafficking.
The report expressed particular concern for country's Rohingya population arguing their "stateless status and inability to receive aid and work legally increases their vulnerability to human trafficking."
Early marriage was also a risk for Rohingya refugee girls, whose families have too many mouths to feed.
Earlier this year, a UN survey found that over half of Rohingya girls who fled to Malaysia, India and Indonesia became child brides.
Young and vulnerable
In the Bangladeshi camp, 10-year-old Noor Kajol is one of those vulnerable.
The young girl fled northern Rakhine State after the military shot her father in the head while the two of them were brushing their teeth, she said.
The eldest of five siblings in a fatherless household, she is now particularly at risk of exploitation.
The abduction and trafficking of minors is not a new threat faced in Bangladesh, which has been hosting hundreds of thousands of Rohingya refugees since the 1990s. In the first half of 2017, aid group Action contre la Faim (ACF) recorded the disappearance of 16 Rohingya children.
But the sheer scale of the recent influx makes the new settlements fertile territory for traffickers, and it is not just the unaccompanied or separated children who are at risk, said Lieby.
"New families are vulnerable because they have lost everything and they need income so they are more inclined to hand their children over to harmful entities," he said. "Our message is don't give you child to anyone you don't know."
Hussain and Mufisa are safe for now, having been taken in by fellow refugee Zafor Ahmed, a stranger who found the boys crying by the side of the road.
"But it is not safe for them on their own so I am happy to look after them until the government of Bangladesh or another organisation can take responsibility," said 45-year-old Zafor.
