Sheffield United's face a delay of up to 10 days.
Premiership Turn Table On Blades
Sheffield United's face a delay of up to 10 days.
A decision is due before the end of the month but it has been confirmed by the Premier League they are investigating the transfer of Kabba from the Blades to Watford.
It has been claimed Sheffield United insisted Watford, who bought Kabba for £500,000 during the January transfer window, could not play the striker against them at Bramall Lane in April - a match Watford lost.
Such clauses are not permitted in transfers between Premier League clubs and though a similar situation occurred with Everton keeper Tim Howard against his old club Manchester United, those clubs escaped disciplinary action as there was no formal agreement between them.
The row threatens to overshadow the Blades' fight to avoid relegation.