It should be noted, the SOHR considers the following figures on ISIL, al-Nusra and other rebel fatalities to be higher due to the groups efforts to hide their losses.
According to SOHR, Russian airstrikes in Syria killed 11,932 people, of which: 3,358 were ISIL fighters, 3,407 militants from the Al-Qaeda affiliate al-Nusra Front and other rebel forces and 5,167 civilians.