Lincoln City have placed manager Gary Simpson on gardening leave and put director and first-team coach Chris Moyses in charge of first-team duties for the "foreseeable future".
Simpson was appointed boss of the Conference side in February 2013 and signed a three-year deal in April 2013.
A club statement said the decision was taken after looking at "progress made and performance levels" this season.
The 53-year-old will be on gardening leave until his "future is resolved".
|Analysis: Michael Hortin, BBC Radio Lincolnshire sports editor, on Gary Simpson's departure|
|"After saving the club from relegation and then a rebuilding season, this campaign was targeted as one to be in and around the play-offs."With the stronger group of players, City have stuttered, and as a result Simpson's decision-making and demeanour have come under the spotlight."This was highlighted further by throwing away a 3-0 lead at Forest Green."Now the board hope to recruit a new manager who can hit the ground running and move the club up the table - no mean task."|
The Imps are 13th in the Conference table following Saturday's 3-3 draw with Forest Green Rovers, a game they had led 3-0.
Lincoln, who have won just two of their last 10 league matches, are eight points adrift of the play-off places and seven points above the relegation zone after 18 games.
Sheffield-born Simpson has a strong link to Lincolnshire, having played almost 200 games for Boston during two spells with the club and also been manager of Gainsborough Trinity for two seasons.
He was named Imps manager last year with the club two places and two points above the relegation zone following David Holdsworth's departure.