Sky Sports sources understand that Celtic have rejected Hull City's bid for Gary Hooper.
We revealed early on Wednesday that newly promoted Hull had made a move for Hooper and lodged an offer for the former Scunthorpe United striker.
However, with the bid believed to be just over £4million, Celtic have reacted quickly by turning down the offer.
Hooper has just one year left on his contract at Celtic Park, and is attracting a great deal of interest from his native England.
Norwich City, who tried to buy him in January, along with, Sunderland, Southampton and Reading are also being linked with the 25-year-old forward.