Four nationalities, four religions of that Russian force. The commander is a Sunni, his personnel deputy a Shia, they oversee Orthodox Christian soldiers and one Buddhist. But first and foremost they’re all Russian.
https://www.youtube.com/watch?v=6PEzqc7kUQA
Their job is to provide security for the Russian sappers clearing mines and unexploded ordnance.
They are also tasked with cordoning off explosives-infested areas to prevent civilian casualties and guarding Russian mobile hospitals.