Russian air strikes in Syria likely killed more than 1,000 civilians in the war-torn country during the last quarter of 2015, the Airwars monitoring group said Tuesday, according to AFP.

The London-based group gathered media and social media reports - as well as accounts from rebel groups and non-governmental organizations - to compile a grim database detailing every known civilian casualty incident that allegedly involved Russian aircraft.

Airwars said its provisional view was that from September 30 - when Russia entered the Syrian civil war to shore up the regime of President Bashar al-Assad - and December 31, between 1,096 and 1,448 civilian non-combatants were "likely" to have been killed in 192 Syrian incidents "where Russian strikes appear to have taken place in the near vicinity on that date."

The group also said that 1,700 civilians were "credibly reported injured" in the 192 incidents, an inevitable consequence of Russia's use of non-precision munitions.