"We have already compromised on some issues, as Staffan de Mistura has voiced a proposal to Nusra Front militants to leave eastern Aleppo without surrendering arms. We were against this idea but we agreed as we wanted to help save lives in Aleppo," Lavrov said at the Rome MED — Mediterranean Dialogues 2016 conference.
According to Lavrov, a number of countries have rejected de Mistura's proposal.
"I think it was done because someone could benefit from leaving the eastern part of Aleppo under control of Nusra Front, which is, of course, unacceptable," Lavrov stressed.
Lavrov said that the current situation in Eastern Aleppo is the result of the failure to dissociate armed opposition from terrorists.
"Washington made a big mistake when it missed the chance to implement Russian-US agreements on Syria," Lavrov elaborated.
Talking about joint Russian-US joint efforts to counter terrorism, Lavrov said that Russia is ready to cooperate with the administration of US President-elect Donald Trump in anti-terrorism efforts should Washington show such an intention.
"If the United States focuses on the fight against terrorism and if it wants to cooperate with Russia, we will certainly be ready," Lavrov said in Rome.