According to a joint statement of Russia, Iran and Turkey issued following Syrian peace talks in Astana on Tuesday, the countries agreed to create a trilateral group on monitoring the Syrian ceasefire.
"We are increasing cooperation with Turkey, Iran, other regional states to resolve urgent issues of the Syrian crisis. Thanks to the coordinated efforts, primarily via military agencies, it was possible to liberate Aleppo from extremists, then introduce the cessation of hostilities on the basis of the agreement of December 29 last year," Lavrov said speaking in the Russian parliament, Sputnik reported.
The nationwide ceasefire in Syria backed by Russia and Turkey came into effect on December 30 and was later supported by a UN Security Council resolution.
Russia's draft of the Syrian constitution takes into account the interests of official Damascus, the opposition and other regional players, Lavrov said.
"We have distributed the draft constitution in Astana, which we developed taking into account everything that we have heard from the opposition, the government, and from regional countries over the years."
The outcome of the latest meeting between the armed Syrian opposition and government delegations in Kazakhstan takes the crisis settlement efforts to the next level, he said.