A policeman in Burma fled the scene of a deadly mob attack on Rohingya Muslims that has put the troubled western state of Rakhine on edge, two police officials said on Wednesday.

A group of Rakhine Buddhists threw bricks at Rohingya men in the state capital of Sittwe on Tuesday, killing one - identified as Maung Nu, also known as Monir Ahmad, 55 - the office of State Counsellor Aung San Suu Kyi said in a statement.

Two police officers told Reuters an unarmed junior policeman was with the Muslim men at the time of the attack but was unable to protect them from the mob.

“We questioned the young policeman. He said he tried to stop them but he wasn't able to and ran away back to the police station,” said Colonel Myo Thu Soe, spokesman for the home affairs ministry in the capital, Naypyitaw.

No one had been arrested for the attack, but an investigation was going on, he said.

Rakhine State has seen the most serious religious violence in predominantly Buddhist Burma since the military began to end its decades of strict rule, with hundreds of Rohingya Muslims killed and more than 140,000 people displaced there in communal unrest in 2012.

Suu Kyi, who came to power last year as part of the transition from military rule, has emphasised the importance of the rule of law in solving conflict between Buddhists and minority Muslims.

Tension has been running high in the state since an army crackdown in response to Rohingya insurgent attacks in October, but Sittwe has not seen a repeat of the communal clashes of 2012.

On Tuesday, seven Muslim men had travelled into Sittwe from a camp on its outskirts housing people displaced in 2012. They got into an argument with a Buddhist ethnic Rakhine man over the purchase of a boat, attracting the attention of residents who began to attack them.

“The people didn't attack the police because he's the same race,” said Lieutenant Colonel Win Naung of Sittwe district police.

Burma does not recognise the more than 1 million Rohingya Muslims in Rakhine as citizens. Many in Burma consider the them illegal immigrants from Bangladesh.

Myo Thu Soe said the policeman on the scene was unarmed and inexperienced and unable to protect the Rohingya men.

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

Despite the fact they had a police escort, Myo Thu Soe said the Muslim men were not authorised to travel to the area.

Since the 2012 violence the city's Muslims have been confined to camps or a single city ward, unable to travel freely without a police escort.