Was the Balrog drawn by the ring?

[Zigûr]

Originally Posted by Inziladun

Since the One contained part of Sauron's will and spirit, and it is elsewhere noted that it 'calls' to evil creatures, I do not think it is by any means a stretch to assume that the Ring was a factor in the Balrog's attack on the Fellowship.

This is an excellent observation. Another thing to emphasise for the sake of clarity, in my opinion, is that we must remember that just because Sauron's Ring called to other evil beings, or that Sauron's malice may have awoken them (in the possible case of the Balrog) that does not mean that they were under the direct influence or control of Sauron himself.

Part of the fissiparous nature of evil was that there were many evil things, but they were not all controlled by the same evil will.