At least 200 civilians were killed in Russian air strikes in Syria from 30 September to 29 November, an Amnesty International report says.
'No military targets'
In the report, Amnesty said it had "researched remotely" more than 25 Russian attacks that took place in Homs, Hama, Idlib, Latakia and Aleppo between 30 September and 29 November.
It had interviewed by phone or over the internet witnesses to the attacks, and had audio and video evidence, as well as "advice from weapons experts". Amnesty said.
It said there was evidence that Russia's military "unlawfully used unguided bombs in densely populated areas and inherently indiscriminate cluster munitions".
Amnesty set out its findings into six attacks - each of which, it said, caused dozens of civilian casualties, but had no obvious military target nearby.
On 29 November, for example, it said at least one suspected Russian warplane fired three missiles into a busy public market in Ariha, in Idlib province.
A local activist group said a total of 49 civilians were either killed or missing and feared dead.
"It was a normal Sunday; there was nothing unusual. People were buying goods; children were eating," the activist, Mohammed Qurabi al-Ghazal, told Amnesty.
"First there was a loud explosion - dirt flying in the air - followed immediately by shock. In just a few moments, people were screaming, the smell of burning was in the air and there was just chaos."
He said the armed group Jaysh al-Fateh controlled the area, but did not have any presence inside Ariha itself.
"Some Russian air strikes appear to have directly attacked civilians or civilian objects by striking residential areas with no evident military target and even medical facilities, resulting in deaths and injuries to civilians," Amnesty's Philip Luther said.
"Such attacks may amount to war crimes," he added.