Russian President Vladimir Putin has ordered his defence minister to begin pulling out "the main part" of Russian troops in Syria.
The announcement came just hours after
peace talks between the Syrian government and the opposition got under way in the Swiss city of Geneva on Monday.
"The task presented to the defence ministry and the armed forces has been completely fulfilled," Putin told Sergei Shoigu, according to the state news agency TASS.
"Thus, I order the defence minister to begin withdrawing the main part of our troops from the Syrian Arab Republic."
Putin said he hoped the withdrawal of Russian troops from Tuesday will be a stimulus for a political resolution of the conflict.
"I hope today's decision will be a good signal for all conflicting parties. I hope it will sizeably increase trust of all participants in the process," he said.
"I ask the Russian foreign ministry to intensify Russia's participation in organising the peace process to solve the Syrian problem."
Shoigu said the Russian troops killed more than 2,000 rebel fighters, including 17 rebel leaders, since the start of the operation.
Dmitry Peskov, Kremlin spokesperson, said Putin discussed and coordinated the decision with Syrian counterpart Bashar al-Assad.
"Everything voiced at the meeting [of Putin, Foreign Minister Sergey Lavrov and Defence Minister Sergey Shoigu] was told our Syrian colleagues and coordinated with President [Bashar] Assad," Peskov said.
Russian bases in Syria's Tartus and Khmeimim are to continue operating in routine regime, Putin said.
"Our bases - the naval base in Tartous and the airbase at the Khmeimim airfield - will operate in a routine mode. They are to be safely protected from the land, from the sea and from air," he said.
Those Russian soldiers who will stay in Syria will be engaged in monitoring the ceasefire regime, Putin said.
Pavel Felgenhauer, a Russia defence analyst, says Russia is seeking a compromise with the West.
"This is Russia's air force that is in action," he told Al Jazeera from Bucharest, Romania.