Steve Kean has been 'forced to resign' after his position as Blackburn manager became 'untenable'.
The 44-year-old has ended a tumultuous two-year spell in charge of Rovers which reached a low point with relegation from the Premier League at the end of last season.
The tide appeared to have turned for the Scot, on the pitch at least, as Rovers made a positive start to the current campaign.
However, the fan protests that have plagued his tenure at Ewood Park continued unabated and, despite having the apparent backing of owners Venky's, he has decided to step down.
Kean said: "For reasons that I cannot discuss on legal advice, it is with deep regret, given my hard work and service for the club for a number of years, that I have been forced to resign as manager of Blackburn Rovers Football Club with immediate effect, due to my position as team manager becoming untenable.
"I wish to thank all the players and coaching staff for their great support and the majority of the fans, who now see their club heading towards an automatic promotion position back to the Premiership. I wish the club all the very best for the future."
Rovers officials are apparently unaware of his decision.
Managing director Derek Shaw said: "I have been travelling down to London and this is the first I have heard of it."