Birmingham have offered new contracts to four players as they continue talks with goalkeeper Darren Randolph.
Wolves' Bakary Sako has revealed he is mulling over offers from the Premier League but is yet to decide on his future.
Bundesliga side Hoffenheim have completed the signing of Norway striker Tarik Elyounoussi.
The 25-year old will join on a four-year deal from Rosenborg for a reported fee of £2.25million and he will complete the switch after the Norwegian club's game with Stromsgodset on June 22.
Elyounoussi has found the net six times in the opening 12 Tippeligaen games this season and Hoffenheim general manager Alexander Rosen was pleased to have sealed the switch.
"We are delighted to have captured Tarik Elyounoussi," Rosen said.
"He is a technically gifted player with a good work rate and he is able to feature in various roles in an attack-minded line-up. He fits right into our way of football."