Former Fulham midfielder Papa Bouba Diop is set to sign a short-term deal with Birmingham.
The Senegal international, who also enjoyed a successful spell at Fulham, will pen a one-month contract after passing a medical and agreeing personal terms.
Short-term deal: Diop will pen a one-month contract with Birmingham
Dioup, 34, was released by West Ham at the end of last season after helping the Hammers achieve promotion back to the Barclays Premier League.
He has impressed Blues boss Lee Clark during a trial period with the npower Championship side and will finalise the switch when his visa application is confirmed.