Lincoln have parted company with manager Peter Jackson and his assistant Iffy Onuora.
The pair have paid the price for City's disappointing start to the season in which the Coca-Cola League Two club have won just two of their opening seven matches this season.
Jackson, who took charge on October 30 2007 following the departure of John Schofield, admitted after the 3-0 defeat at Dagenham at the weekend that he was under pressure to achieve results. Lincoln's 1-0 at Darlington in the Johnstone's Paint Trophy on Tuesday night was the final straw for the board.
A statement on the club's official website read: "The Lincoln City Football Club board of directors have agreed to part company with manager Peter Jackson and assistant manager Iffy Onuora with immediate effect. Following the frustration of last season's poor home form which led to a drop in attendances, the board have been disappointed with the poor start to this campaign and the early exit from two cup competitions.
"It is with regret the board have made this decision as Peter and Iffy have worked hard to raise the profile of the club in many ways, however the bottom line is the need for results."
First-team coach Simon Clark and head of youth Tom Spall have been placed in temporary charge while the search for a new manager is conducted.
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