Foley came on in the Dundee Utd game. I've no reason to doubt they're injured, but with Nolan in particular, it does raise questions regarding the wisdom of bringing in players who haven't played competitive football - even in the reserves - for a long spell, and might be more likely to pick up injuries.
Actually, just checked - Foley and Nolan are on the official list. Injuries TBC, return TBC.