user: input: Article: The commander, who wishes to remain anonymous, told the BBC that most of the district had already been taken.
He said the Afghan government now controls just a few square kilometres of Sangin city.
The Afghan army and local governor's office dismissed the claims.
A spokesman for the Helmand governor acknowledged there had been security problems in the past but said there was no "serious threat" that could lead to the fall of Sangin.
The unnamed commander warned that even the remaining areas under government control were under imminent threat.
Almost a quarter of British military personnel killed during the UK's combat mission in Afghanistan died defending Sangin.
There were reports in December last year that the district was almost entirely in Taliban hands but since then the Afghan government has sent in reinforcements.
Government officials have repeatedly asserted that, despite the continuing Taliban assault, Sangin is secure. The commander, however, paints a very different picture.
Speaking via satellite phone, he told the BBC's Mahfouz Zubaide in Kabul that there had been repeated Taliban attacks on the remaining government positions in recent days, killing a number of soldiers.
Eight Afghan soldiers were killed and nine were taken alive when the Taliban overran a base called "Sahra Yak" three days ago, he said.
All the weapons and ammunition were seized, including an armoured vehicle.
"Two other camps are also under threat, if they don't get the support needed, God forbid, they will have the same fate," he said.
The commander claims there have been no reinforcements for days and rations are low.
"It is the fourth day that one dead body is with us, and four wounded in the past week," he said. "It is the tenth day that we eat only dry bread, borrowing it from the local police."
He said that even in Sangin city the Afghan army only controls a few key locations. The rest, including the bazaar, are in Taliban hands.
The commander says the perilous situation in Sangin is well-known within the Afghan command: "Our superiors all know, including the commander of the brigade and the Army's chief of staff."
In response, Mohammad Rasul, who commands the 215 Afghan National Army, acknowledged the bazaar was in Taliban hands but said army forces were still in the district.
He said food and ammunition were delivered to the forces by air and that casualties were evacuated on time.
The latest reported setbacks come despite a big increase in support from international forces, with ground troops and airpower committed to the battle in Helmand.
The Nato combat mission in Afghanistan officially ended just over a year ago but in recent weeks foreign troops have increasingly been been drawn back into the conflict.
Last month, a US Special Forces soldier was killed and two were injured fighting the Taliban in Helmand alongside Afghan troops.
The commander knows he is taking a grave risk by speaking to the BBC. "What I'm telling is against the army regulations," he said. "It is a crime amongst the military personnel, but this is how desperate we have become."
A few weeks ago the deputy governor of Helmand province, Mohammad Jan Rasoolyar, was sacked after he posted an open letter to Afghan President Ashraf Ghani's government on Facebook.
His complaints were very similar. He said the military and police forces in Sangin were short of ammunition and food and were encircled by Taliban fighters.
Despite his urgent pleas, the government had done nothing to help, he said.

Summarize.
output: The key district of Sangin in the southern Afghan province of Helmand is once again on the verge of being overrun by the Taliban, according to an Afghan army commander.

input: Article: The Nigerian government say the release comes after negotiations with the extremist group.
276 schoolgirls aged 16-18 were taken from a school in Chibok in Nigeria in April 2014. Some managed to escape but 219 were still missing.
Boko Haram took the girls because they are against children - especially girls - getting an education, like they do in the UK.
At the time they were taken people all over the world who were shocked by the story and they started a campaign called "bring back our girls".
Up until now, only one girl had been found: 19-year-old Amina Ali Nkeki was rescued in May.
The 21 schoolgirls have been taken to an army base by the International Committee of the Red Cross.

Summarize.
output: Twenty-one of the schoolgirls kidnapped by Boko Haram in Nigeria, Africa have been freed, according to the country's President.

input: Article: The man, in his 40s, was pulled unconscious from the water by Humber Coastguard near Haile Sand Fort off the coast at Cleethorpes at about 21:00 BST on Wednesday.
He was flown to Hull Royal Infirmary where he was pronounced dead, Humberside Police said.
The force said the man's death was not being treated as suspicious.

Summarize.
output: A man has died after getting into difficulty while swimming with friends in North East Lincolnshire.

input: Article: Sean O'Halloran, 30, from Northland Road in Derry is accused of raping a woman in May 2014.
The defendant who is a journalist with BBC Radio Foyle faces two additional charges of sexual assault on the same date.
Mr O'Halloran, who denies all the charges, is on trial at Londonderry Crown Court.
The court was played a recorded interview from 21 May 2014, in which the woman, who cannot be named, told a detective that she had been having a normal Saturday night and had been to a bar with friends before she and her boyfriend invited a number of people, including Mr O'Halloran, back to their house.
She said she had been watching a film but went to bed because she was tired and that her boyfriend and two male friends were left downstairs.
She told the detective she got into bed fully clothed and that a short time later she had felt someone getting into bed beside her and putting an arm around her.
The woman told the detective she had assumed it was her boyfriend but that a minute later she felt this person pulling off her trousers and underwear. When she turned around she said she could see who it was.
She described him as being completely naked, that he ripped her top off and that he then sexually assaulted and raped her.
The woman went on to say that she tried to shove Mr O'Halloran off her and that she started screaming and asking him 'what he was doing?'
She said he initially said nothing before asking her: "What are you doing?", "what are you talking about?"
The woman said she ran downstairs and told her boyfriend what had happened before calling the police.
She further told the detective that she had known Mr O'Halloran for a couple of years and had disliked him because he had made previous advances towards her, which she had resisted.
She said on one occasion he had grabbed her legs and tried to kiss her.
Under cross-examination by a defence lawyer, the woman denied that sexual contact had been consensual or that she had made her claims up for money.
The trial, which is expected to last for five days, continues.

Summarize.
output:

assistant: A woman has claimed that a BBC journalist raped her as her boyfriend slept downstairs, a court has heard.