Syrian pro-government forces have been entering homes in eastern Aleppo and killing those inside, including women and children, the UN says.
The UN's human rights office said it had reliable evidence that in four areas 82 civilians were shot on sight.
"We're filled with the deepest foreboding for those who remain in this last hellish corner" of eastern Aleppo, said spokesman Rupert Colville.
Rebels, who have held east Aleppo for four years, are on the brink of defeat.
http://www.bbc.co.uk/news/world-middle-east-38301629