Birmingham midfielder Stephen Clemence and striker DJ Campbell have emerged as targets for ambitious Leicester. Foxes boss Martin Allen has already signed 10 players during the close season to boost their promotion bid.
Clemence, 29, signed from Tottenham four years ago and played a key role in Bimringham's return to the top flight.
Campbell scored 13 goals last season but Blues boss Steve Bruce has to offload players before he can strengthen his squad.