Rafael Benitez has been sacked as Everton manager after less than six months and two weeks in charge.
The Toffees named the former Liverpool manager, 61, as Carlo Ancelotti’s successor in June.
Everton, who lost 2-1 to Norwich City on Saturday, have won just one of their last 13 Premier League games and sit 15th in the table, six points above the relegation places.
The club say an update on a permanent replacement will be made in due course.
Everton held an emergency board meeting on Saturday to discuss Benitez’s future following defeat at Carrow Road, which was the ninth defeat in the club’s last 12 league games.
The traveling Everton contingent demanded that Benitez “leave our club”, while another supporter burst onto the pitch in an attempt to take on the Spaniard.
Benitez, whose previous Premier League job was at Newcastle United, leaves Everton with a 31.8% win rate, the lowest record at the helm of an English club.
Everton have 19 points after 19 games and only twice previously have the Toffees had fewer points at this stage of a Premier League campaign (17 in 1997-98 and 2005-06).
Everton have won four of their first six league games under Benitez, taking 13 points from a possible 18, but their form has faltered since October.
“An update on a permanent replacement will be made in due course,” Everton said.