Mikhail and Locke

I just read the quote of the day on the Lostpedia homepage, and this was is...

SAYID: The more I learn about your people, the more I suspect you’re not as omniscient as you’d have us believe. Don’t speak to us as if you know us.

MIKHAIL: Of course I don’t know you, Sayid Jarrah. How could I? And you, Kate Austen, are a complete stranger to me. But you John Locke, you I might have a fleeting memory of, but I must be confused, because the John Locke I know was paral—

Did they ever state how Mikhail knew about Locke and that he was paralyzed? Or how might they know each other.

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