The 31-year-old Republic of Ireland international handed in a transfer request in early January amid interest from Aston Villa and has not featured for the Canaries since New Year's Day.
On Thursday afternoon, Hoolahan allegedly made derogatory comments about the Norfolk side to a television reporter, whose cameraman was on-hand to witness the incident.
When questioned on the situation, Hughton said: "What you are telling me is news to me. It is not something I am aware of and is something I will have to investigate.
"What I have always been able to do is front the media on something I have knowledge of and can speak of in an appropriate and correct way.
"We know it is an unsettling time for players in that situation (out of the team), but it won't be the first or the last time you have to deal with situations like that, and it is my responsibility as the manager (to do so).
"There are always going to be procedures you have at the club, whether a player wants to go or whether the club want to keep that particular player.
"At this moment, Wes is very much a Norwich player."
Hoolahan is not expected to play any part when City face potential relegation rivals Cardiff at Cardiff City Stadium on Saturday.