The source told Interfax news agency that Russia will start repairing a second runway at Hmeimin air base near Latakia, while the Tartus naval base will be upgraded in order to handle bigger ships such as cruisers.
President Vladimir Putin has announced a partial withdrawal of Russian forces from Syria, where they have been helping forces loyal to President Bashar Assad. But Moscow wants to retain a permanent presence both in Hmeimin and Tartus, Reuters reported.
The source also told Interfax that Russia will still deploy S-300 surface-to-air defense systems and Bastion coastal missile launchers in Tartus.