Three people have been killed during a stampede for aid outside a Rohingya refugee camp, according to agencies.

One woman and two children reportedly died as food and clothing were being thrown from relief trucks, said the Inter Sector Coordination Group in Bangladesh. The victims' names and ages have not been released.

The news from the south Bangladeshi border comes as around 409,000 migrants have arrived at the refugee camps since 25 August as Rohingya people flee persecution and violence in their home country in Burma.

Thousands more refugees are reportedly arriving every day, with no food, blankets or belongings, and they are often malnourished and dehydrated. Some people have reportedly been forced to abandon their children or elderly parents in Burma. Other refugees have died as they trekked for up to 10 days through mountainous terrain and tried to cross the Naf river along the northern part of the Rakhine state.

With refugee camps overcrowded – they have doubled in population over the last few weeks – unofficial aid deliveries from sympathetic people in Bangladesh can cause frenzied stampedes, who hope to catch some of the supplies.

AKM Iqbal Hossain, a police superintendent, said: “As many private and social organisations are coming and distributing relief, sometimes chaos breaks out.”

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

The unofficial method of delivering aid has also been criticised by relief agencies.

While some people jump up onto the relief trucks, they are beaten down by men with sticks, and children can often be missed by truck drivers, according to Corinne Ambler, spokeswoman for the International Federation of the Red Cross, who spoke to CNN.

Rohingya Muslims flee violence in Burma

But as relief agencies are prioritising aid for pregnant women and children, which is just enough to keep people alive, others can become desperate.

The outpouring of Rohingya, a stateless Muslim minority in Burma, was sparked after Rohingya militants killed 12 security officials at a government border post and the military reacted with strong violence, reportedly attacking civilians and burning villages.

Rohingya mothers face persecution Show all 10 1 /10 Rohingya mothers face persecution Rohingya mothers face persecution Ramida Begum holds her 10-day-old daughter in their shelter in Kutupalang, an unregistered refugee camp in Cox's Bazar, Bangladesh. 'The military caught my husband and burnt our house down a week before I left Myanmar. Since then I don't know whether my husband is dead or alive' Reuters Rohingya mothers face persecution Minara Begum sits inside the shelter, cradling her one-month-old son Ayub. Minara fled to Bangladesh from Nasha Phuru village in Myanmar with her husband and mother-in-law. 'My child doesn't get enough breast milk as I don't eat enough nutritious food. I have to buy milk powder from local market though it's not very good for my son' Reuters Rohingya mothers face persecution Amina, pictured with her 16-day-old daughter Sumaiyin, is in a refugee camp Balukhali that neighbours Ramida and Minara's. 'One and a half months ago the military came to our village and kept firing their guns. I ran away with my neighbours to save our lives. You see us alive here only because the God was so kind. They caught my uncle and my younger brother and we don't know whether they are dead or alive' Reuters Rohingya mothers face persecution Fatema sits beside her one-day-old daughter Aasma in Kutupalang. Fatema fled to Bangladesh from Jambuinna village in Myanmar two months ago after her house was burnt down by the military. She crossed Naf River by boat during the night. 'Our situation is better than many other refugees as my husband Mohammad Alom works here as a day labourer. Many of the new refugees have no work here, so they have to rely on relief' Reuters Rohingya mothers face persecution Jamalida cradles her two-month-old daughter Shahida. Jamalida came to Bangladesh with her husband from Nasha Phuru village in Myanmar Reuters Rohingya mothers face persecution Rehana Begum lays her one-day-old daughter in front of her inside their tarpaulin shelter. Rehana fled her village of Jambuinna in Myanmar three months ago. 'We were in our home and suddenly the military came to our village and started shooting. When we heard the sound of gun shots we immediately went to our relatives. We walked for four hours without any food and water to reach the border at 1 a.m. We paid 25,000 Myanmar kyat (£14) to a broker to cross.' Intercepted by Bangladesh border guards, Rehana's family narrowly escaped being sent home. 'They wanted to send us back, but then we heard gunshots from the Myanmar side and the guards released us, saying, "Stay in Bangladesh and save your lives"' Reuters Rohingya mothers face persecution Noor Begum sits next to her one-day-old daughter Sumaiya as she stares into the camera. Noor came to the camp one-and-a-half months ago from Nagpura village with her husband Jahangir Reuters Rohingya mothers face persecution Rajuma Begum observes her one-month-old son Raihan. 'I fled to Bangladesh because of fear, because I needed to save my children. I was pregnant and suffering from fever while crossing the border. I also have an 11-month-old boy, so it was very difficult to reach the border from our village Wabek in Myanmar. I had to rest frequently. After six hours of horrible walking we finally reached the border at 2am and crossed after paying a broker' Reuters Rohingya mothers face persecution Eighteen-year-old Asmot Ara rests her newly born daughter on her lap. Asmot said she came to the camp one month ago with neighbours from Nagpura village. In Myanmar her father-in-law was killed and their home burnt down by the Myanmar military Reuters Rohingya mothers face persecution As Marijaan holds her 25-day-old daughter Noor Habi, her son peers over her shoulder. Marijaan fled to Bangladesh from Khyeri Prang village in Myanmar one month ago after her house was burnt down by the Myanmar military. 'I reached the border at night and crossed by the boat. I paid the boatman to cross the Naf River' Reuters

The Burmese officials have even been accused of genocide and “ethnic cleansing”, while the Government denied these claims and said it has been targeting terrorists.

The Burma government also said 176 out of 471 Rohingya villages have been abandoned, and has accused Muslims of “destroying their own homes”.

The border camps and the Rakhine state in western Burma are heavily restricted for journalists, who are left unable to verify reports.

Many people trying to flee their villages have been targeted by Buddhist mobs and government security officials. Before the violence started, around 1 million Rohingya Muslims lived in Rakhine.

The government maintains that Rohingya have never been an ethnic group in Burma – despite generations of families in the country – and has denied them citizenship. Many communities were living off food packages from charities until deliveries were suspended after 25 August.