Sheffield Wednesday have parted company with manager Paul Sturrock less than a month after he signed a new contract.
Sturrock took over at Wednesday in 2004
The Owls are struggling in 21st place in the Championship and were thrashed 4-0 by Colchester on Wednesday.
"Our league position says it all," Wednesday chairman Dave Allen told the club website.
"In spite of strengthening the squad this year, we have not made the desired progress and, to that end, we need a change in the coaching staff."
Sturrock joined the Owls in 2004 and committed to the Hillsborough club until the summer of 2010 in a new deal last month.
Chairman Allen said an announcement regarding who will take temporary charge of the team would be made on Friday and that the search for a new manager had already started.
Wednesday were 14th in League One when Sturrock joined but the Scot managed to guide them to promotion via the play-offs that same season.
The 49-year-old started his managerial career in Scotland with St Johnstone and Dundee United before spells with Plymouth and Southampton.