The British Boxing Board of Control are to investigate comments made by Carl Froch on Wednesday.
The Cobra said he was prepared to kill Mikkel Kessler in order to get revenge over the Dane on Saturday night.
The Briton apologised on Twitter on Thursday, saying: "I'm sorry if my comments yesterday offended anyone. This fight means so much to me & emotions are running high. See you at the weigh-in."
However, the Board's general secretary Robert Smith said the governing body would look into the comments, saying: "Carl's comments are inappropriate and we are disappointed in them."
While boxing history is littered with similarly ill-advised comments, Smith said he was particularly disappointed to see them come from a fighter like Froch.
Smith said: "They are very uncharacteristic from Carl, who is usually a very well-behaved and measured young man.
"We are surprised and disappointed in his comments, however I have spoken to his management team of Rob McCracken and Eddie Hearn and we are looking into it and will deal with it accordingly.
"Carl is licensed by the Midlands Area Council and they will deal with it as quickly as they possibly can. Obviously we are not in a position to do anything about it before the fight.
"Up until now all the publicity surrounding the fight has been superb and this has dampened it somewhat."
What is the likely outcome of Froch v Kessler II?
Froch wins by stoppage
Froch wins on points
Kessler wins by stoppage
Kessler wins on points