Middlesbrough condemned Cardiff to an eighth successive Championship defeat with a 2-0 victory that saw the end of Mick McCarthy's reign at the Welsh club.
Andraz Sporar's first-half penalty and Martin Payero's late second secured a third successive win for the play-off chasing visitors.
It was visiting boss Neil Warnock who was celebrating at the end on his return to the club he led to the Premier League in 2018.
Just over an hour later it was announced by Cardiff that McCarthy - who only joined the club in January - had left "by mutual agreement".
At the top Bournemouth extended their lead to six points with a 3-0 victory over Huddersfield.
Dominic Solanke opened the scoring from the penalty spot in the 10th minute after he himself had been brought down.
Solanke then doubled the advantage from close range after Philip Billing nodded the ball into his path, and captain Lloyd Kelly wrapped it up in the 64th minute.
West Brom overtook Fulham - who play at resurgent Nottingham Forest on Sunday - to move into second place with a comfortable 3-0 win over Bristol City.
Jordan Hugill gave Albion a seventh-minute lead as he finished off a flowing team move and Kyle Bartley then nodded home a second from Darnell Furlong's long throw three minutes before the break.
Karlan Grant latched onto a poor backpass after 52 minutes to put the game beyond the Robins.
Coventry remained in fourth after a 1-1 draw with Derby. Matty Godden had put them ahead in the 20th minute from the penalty spot but Graeme Shinnie earned the Rams a point 12 minutes from the end.
Elijah Adebayo's 17th-minute strike earned Luton a 1-0 win over struggling Hull.
Siriki Dembele hit a stoppage-time winner for Peterborough to complete a 2-1 comeback win over QPR after Harrison Burrows cancelled out Ilias Chair's opener.
Tom Bradshaw's second-half double saw Millwall come from behind to impressively beat Stoke 2-1. Romaine Sawyers scored Stoke's opener.
Goals from Keshi Anderson and Gary Madine gave Blackpool a 2-0 derby victory over Preston, who had Alan Browne sent off late on, and two goals in three minutes from Sam Gallagher and Tyrhys Dolan guided Blackburn to a 2-0 win over Reading.
Riley McGree hit the winner eight minutes from time to earn Birmingham a 2-1 win over Swansea after Troy Deeney's opener was cancelled out by Michael Obafemi.
Australian Associated Press