The UN human rights office says it has received reports of Syria's pro-government forces killing at least 82 civilians in eastern Aleppo. UN human rights office spokesman Rupert Colville says the reports say pro-government forces entered homes and killed some civilians "on the spot" in four different neighbourhoods in the increasingly-shrinking rebel enclave.

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A man carries a child as he flees deeper into the remaining rebel-held areas of AleppoAbdalrhman Ismail/Reuters

Colville expressed deep fear of retribution against thousands of civilians still believed to be holed up in a "hellish corner" of less than a square kilometre of the opposition-held area. "The reports we had are of people being shot in the street trying to flee and shot in their homes", he said.

The commander of a rebel group in Aleppo is urging the US and Turkey to move quickly to save civilians in what remains of the opposition's eastern Aleppo enclave from an assault by the government and its allies. "My message is that they must take a decision to save these people who are stuck here, these civilians, these children," Abu Ali Saqour, the commander of the Jabha Shamiya group, told Reuters, the sound of explosions audible in the background as he spoke via Whatsapp from eastern Aleppo.

"No state has helped these people in any way, my message to the world is to get these people out of this disaster-stricken city, at least the civilians," he said, singling out the US and Turkey as governments with the power to do something. "Any state with power in its hands must take a decision as soon as possible to evacuate these people," he said.

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Syrian residents flee violence in Aleppo's eastern al-Salihin neighbourhood after regime troops retook the area from rebel fightersGeorge Ourfalian/ AFP
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Boys collect firewood to be used for heating in a rebel-held besieged area of AleppoAbdalrhman Ismail/Reuters
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A Syrian pro-government fighter carries a wounded woman who was reportedly shot by rebel sniper fire while fleeing with her family Aleppo's eastern al-Salihin neighbourhood, after troops retook the area from rebel fightersGeorge Ourfalian/AFP
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Children push containers in pushchairs as they flee deeper into the remaining rebel-held areas of AleppoAbdalrhman Ismail/Reuters
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A man pushes a cart carrying an elderly woman and belongings as they flee deeper into the remaining rebel-held areas of AleppoAbdalrhman Ismail/Reuters
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Elderly man reacts in the government-held Sheikh Saeed district of Aleppo during a media tourOmar Sanadiki/Reuters
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Civilians wait outside a government military police centre to visit their relatives, who were evacuated from the eastern districts of Aleppo and are being prepared to begin their military service in AleppoOmar Sanadiki/Reuters
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Still image taken from a drone footage and released by Russia's Defence Ministry on 10 December, 2016, shows civilians moving in streets as they leave what the Defence Ministry said was the eastern quarters of Aleppo, SyriaMinistry of Defence of the Russian Federation/ Reuters
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Still image taken from a drone footage and released by Russia's Defence Ministry on 10 December, 2016, shows civilians moving in streets as they leave what the Defence Ministry said was the eastern quarters of Aleppo, SyriaMinistry of Defence of the Russian Federation/ Reuters
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Syrian civilians flee the Sukkari neighbourhood towards safer rebel-held areas in southeastern Aleppo, during an operation by Syrian government forces to retake the embattled cityGeorge Ourfalian/AFP

The Jabha Shamiya rebel group is fighting in Aleppo under the banner of the Free Syrian Army, and is one of the factions that has received support from states opposed to Assad, including Turkey.

On the front lines, he said: "The situation is, God willing, good", describing the new positions taken up by the fighters as solid and steadfast. "The situation on the fronts is much better," he said. But bombardment is continuing. "The bombardment is not on the front lines, the greater burden of the bombardment is on the civilians, and this is what is causing a burden on us," he said.

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Smoke rises as seen from a governement-held area of Aleppo, SyriaOmar Sanadiki/Reuters
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Smoke and flames rise after air strikes on rebel-controlled besieged area of Aleppo as seen from a government-held sideOmar Sanadiki/Reuters
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Govermental Syrian forces fire into sky while celebrating their victory against rebels in eastern AleppoOmar Sanadiki/Reuters
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Supporters of Syria's President Bashar al-Assad carry a Syrian national flag with his picture as they celebrate what they say is the Syrian army's victory against the rebels in AleppoOmar Sanadiki/Reuters
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Syrian pro-government forces hold Syrian flags bearing the portrait of Syrian President Bashar al-Assad as they patrol Aleppo's Bab al-Nairab neighbourhoodGeorge Ourfalian/AFP

The Syrian army and its allies have taken full control over all the Aleppo districts abandoned by rebels during their retreat in the city, a Syrian military source said. Rebel defences collapsed on Monday, leading to a broad army advance across more than half of the remaining insurgent pocket in Aleppo and a retreat of opposition fighters to a few districts on the west bank of the Queiq River.

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Syrian pro-government forces patrol Aleppo's eastern al-Salihin neighbourhood after troops retook the area from rebel fightersGeorge Ourfalian/AFP
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Syrian pro-government forces hold a position in Aleppo's Sheikh Saeed district after troops retook the area from rebel fightersGeorge Ourfalian/AFP
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Syrian pro-government forces inspect a building in al-Maadi district of eastern Aleppo after they retook a large part of it from rebel fightersGeorge Ourfalian/AFP

Recapturing the entire rebel pocket of Aleppo will constitute the biggest battlefield victory yet for President Bashar al-Assad and his military coalition of Syrian troops, the Russian air force, Iran, and Shia militias. Its loss will leave the rebels without a significant presence in any of Syria's main cities. They still hold much of the countryside west of Aleppo and the province of Idlib, also in north-west Syria.