Burton Albion have confirmed the departure of manager Gary Rowett, who has joined Birmingham in a similar role.
Rowett, 40, leaves the Staffordshire club in third place in League Two.
Birmingham parted company with Lee Clark on Friday, with the club currently sitting second from bottom in the Championship.
During his playing career Rowett spent two years on the books at St Andrews.
Former Birmingham City defender Gary Rowett is set to become the club's new manager.
Lee Clark was dismissed last week after a disappointing start to the season.
This was compounded on Saturday when the team lost 8-0 at home to Bournemouth.
Burton boss Rowett has seen off competition from Owen Coyle and Mike Phelan to land the St Andrews role.
Rowett's current backroom staff - assistant manager Kevin Summerfield, first-team coach Mark Sale and goalkeeping coach Kevin Poole - could well join him at St Andrew's, having all played for the Blues.
The Birmingham City striker Marlon King has been arrested on suspicion of dangerous driving after a three car accident on the A46 in Nottinghamshire.
A 35-year-old man was flown by air ambulance to hospital with serious injuries following the crash yesterday afternoon.
The 33-year-old Championship footballer has been released bail pending further inquiries.
A spokesman for Birmingham City said: "We are aware of a road traffic accident involving our player and the matter is now being investigated by the police."