Middlesbrough Football Club confirmed this evening that Tony Mowbray has left the club with immediate effect.
Assistant manager Mark Venus will take charge of the team until further notice.
In a brief statement, Middlesbrough FC paid tribute to its former captain, who had returned as manager in 2010:
The club would like to place on record their sincere thanks to Tony Mowbray for all of his substantial efforts, dedication and integrity. He leaves with the very best wishes of all at the club.
More top news
Two women, aged 56 and 66, have been charged with willfully obstructing the highway after being arrested at Kirby Misperton.
Ex Newcastle United striker, Alan Shearer has spoken about owing Freddy Shepherd a "huge debt" for bringing him back home.
Newcastle United have paid tribute to former chairman Freddy Shepherd who has died at the age of 75.