Sky Sports understands Birmingham are poised to sign Crystal Palace midfielder Darren Ambrose.
Blues boss Lee Clark has made a move to bring Ambrose to St Andrew's as he looks to bolster his squad.
A number of other clubs were thought to be chasing the former Newcastle and Charlton man, but Birmingham have stolen a march on their rivals.
Palace have reluctantly agreed to sell Ambrose with the player entering the final year of his contract.
Ambrose is expected to finalise his switch to St Andrew's soon and will become the club's fourth signing of the summer following the arrivals of Peter Lovenkrands, Hayden Mullins and David Lucas.