Bundesliga strugglers Borussia Dortmund have agreed to sign Slovenia international Kevin Kampl in January.
Cardiff have agreed to sell Norwegian midfielder Mats Daehli to Freiburg in January.
York City have sacked manager Gary Mills after a poor run of form left the club hovering above the League Two relegation places.
The Minsterman have not won since the 3-0 victory over Burton Albion on New Year's Day and are now just four points clear of the drop zone.
Mills has spent the last two and a half years at Bootham Crescent and steered York back into the Football League as well as to victory in last season's FA Trophy final.
A statement on the club's official website read: "It is with regret that the York City Board of Directors has terminated the contract of Manager, Gary Mills, with immediate effect.
"The recent playing form, which has resulted in the team achieving only 6 points out of a possible 33, has led the Board to this extremely difficult decision.
"The York City Board of Directors' absolute priority is to safeguard the Club's Football League status and an improvement in results is essential due to our current League position.
"We would like to thank Gary Mills for his great contribution to York City Football Club and for managing last season's promotion team. We wish Gary the very best for his future career.
"The York City Board hopes to make an announcement regarding the Club's new manager within the next week."