The report, in particular, shows alleged cross-border traffic of the Russian troops into Eastern Ukraine.
Having analyzed satellite images, the team found at least 60 roads for illegal crossing of the Ukrainian border for Russian troops.
Besides, the report describes around 30 border crossing points and connection between major crossings of the border and large battles in the borderland in the east of Ukraine.
There is enough evidence of Russian forces' participation in the Donbas war during summer 2014, the Bellingcat team reports.
Ukraine and international community blame Moscow of supporting Donbas separatists, which Russia denies.