Mr Hartley said: "Fans will be concerned with the recent behind-the-scene developments at Cardiff City which appear to put into question the future of our manager, Malky Mackay. Supporters are surprised that someone who appears to have little hands-on experience has been put in charge of transfers at the football club.
"Fans want Malky Mackay, who has done a fantastic job as manager in taking the club to the Premier League, to remain at Cardiff City. We don’t want to see any action taken to undermine his position as manager and Cardiff City’s efforts to have a successful first season in the top division.
"There are fears that the current developments could drive Malky into the arms of another Premier League club and that would be hugely damaging for the Bluebirds. Malky is a talented manager who has huge respect among the fans for what he has delivered.
"Fans deserve a clear statement on the position from the club on what has been happening and Malky’s position needs to be made perfectly clear."