Videos apparently showing rebels killing supporters of Syrian President Bashar al-Assad in Aleppo prove that both sides in the conflict violate human rights, according to Russia's Deputy Foreign Minister Gennady Gatilov.
"The harsh massacre of supporters of the government by the opposition confirms human rights violations are taking place on both sides," Gatilov said on twitter.
"It would be useful if Western and Arab politicians looked at the situation in Syria from this angle too. Everybody must stop violence."
Baroness Amos has told ITV News she is concerned that the situation in Aleppo may be a repeat of the attack on the Syrian city of Homs.
While thousands have fled Aleppo in recent days as violence escalates, those remaining face severe food shortages amid the fierce fighting.
This is a revolution reliant on bravery and bravado and often not much else. This is a brutal fight to the death.