Rebel forces hold only 3 per cent of the east Aleppo enclave, the head of the Syrian Observatory for Human Rights says.
"We are seeing the end of the battle for Aleppo," Rami Abdel-Rahman tells dpa. "The areas still under opposition control are very small, and they might fall at any moment."
Amid ongoing government advances and heavy shelling, activists inside the shrinking rebel enclave have been sending pleas for help to the outside world, saying they fear for their lives if the area falls.
Rebel defences in the enclave, the last major urban area in Syria held by the opposition, collapsed in November after five months of siege and years of devastating airstrikes and shelling.
