Birmingham are stepping up their attempts to appoint a quickfire replacement for Alex McLeish, who will be unveiled as Aston Villa's new manager on Monday.
It is understood former Newcastle boss Chris Hughton and ex-West Brom head coach Roberto Di Matteo have been interviewed by Blues chairman Peter Pannu.
Hughton and Di Matteo both left their previous posts midway through last season and are keen to return to football.
Gianfranco Zola, the former West Ham boss, is also among the candidates on City's short list.
Pannu is a key figure in deciding who will step into McLeish's shoes after the Scot angered sections of Blues and Villa fans by resigning last weekend following three and a half years at St. Andrew's.
But Hong Kong-based club owner Carson Yeung will have the final say on McLeish's successor.
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