Cardiff City chairman Peter Ridsdale has confirmed the club have rejected multi-million pound offers for Joe Ledley and Roger Johnson.
Ledley was the subject of a £5million bid from an unnamed team, with Everton, Stoke City and West Bromwich Albion linked with the midfielder.
Hull City, Birmingham City and Ipswich Town are all rumoured to be admirers of Johnson, who was the target of a failed £4million offer.
Ridsdale told the club's official website: "We have had two offers for separate players this week, one for £5m and another at £4m.
"We have discussed the two offers at boardroom level and unanimously turned them down.
Not for sale
"The key factor is that our manager, Dave Jones, wants to keep this squad together and believes we will challenge for promotion.
"The board decision was to back the manager 100 per cent. Our stance on offers for key players remains unchanged. None of them will be sold ... at any price."
Bluebirds boss Jones added: "We have had bids for our players, but we don't have to sell. We are in a position whereby we can turn down the bids.
"We want to keep Joe and he wants to stay. He can play in the Premiership and hopefully he can do this with Cardiff City.
"We have a good squad of players who a lot of them can play in the Premiership. The best way to keep these players is try and get there."