Sunderland have fired manager Tony Mowbray after 15 months in charge, the Championship side announced on Monday.
“This was a difficult decision to make, but we remain loyal to our ambition and our strategy, and felt that now was the right moment to take this step,” said Sunderland Sporting Director Kristjaan Speakman.
“We are now focused on identifying the right candidate and we will continue to support our coaching team and players throughout the interim period.”
Fellow second-tier side Swansea City have parted company with manager Michael Duff, the club said earlier on Monday.
Assistant head coach Alan Sheehan has taken over as caretaker manager at Swansea, who are without a win in their last five games and stand 18th in the table on 21 points.