The robed men are wearing chain under their robes and were armed with maces. They each wear a silver serpent pendant of Set.
The captured man threw down a mace.
You also have a mace found in the compartment in the base of the statue.
The robed man doesn't say much, but does tell you of the foul shrine to Mitra in a room to the South of their quarters which are in the next room South. They know about the goblins to the East and the exit and not much else.