A major conflict recently broke out in my (uk, academic) organisation between two colleagues originally from India. The aggressiveness of it really stunned ever

A major conflict recently broke out in my (uk, academic) organisation between two colleagues originally from India. The aggressiveness of it really stunned everyone, especially as we thought they were friends. Turns out that none of us had recognised the caste difference between them, which was how the one from a lower caste explained it. It hasn't been resolved. If the one from the upper caste was white and the other black, it would certainly have been swiftly and directly resolved. I don't really know what to do.