Amnesty International accused Russia of using cluster munitions and unguided bombs on civilian areas in Syria in attacks that it says have killed hundreds of people in the past few months, NBC News reported.
These attacks, according Amnesty International's report, may be war crimes.
The report focuses on six attacks in Homs, Idlib and Aleppo provinces between September and November which it says killed at least 200 civilians. It denounced Russia's "shameful failure" to acknowledge civilian killings.
Cluster munitions are by nature indiscriminate and often leave unexploded bomblets on the ground. These can maim and kill civilians long after the cessation of hostilities.