Basing out of Iran as well
Syrian conflict: Russian bombers use Iran base for air strikes - BBC News
Russia's defence ministry says it has used a base in western Iran to carry out air strikes in Syria.
Tupolev-22M3 long-range bombers and Sukhoi-34 strike fighters took off from Hamedan on Tuesday, a statement said. Targets were hit in Aleppo, Idlib and Deir al-Zour provinces, it added. Local groups said 27 civilians had died. It is reportedly the first time Russia has struck targets inside Syria from a third country since it began a campaign to prop up Syria's president last year.