Leicester turned on the style to thrash Plymouth 4-0 at the King Power Stadium as Ipswich won again to keep pace with the Championship leaders.
Stephy Mavididi put the Foxes ahead with a first-half penalty and three goals in six minutes after the restart sealed Leicester's 16th win from 20 games.
Zambia striker Patson Daka marked his first start of the season by doubling the lead four minutes after the break before Mavididi and Wilfred Ndidi piled the misery on the Pilgrims.
Ipswich remain a point behind Leicester after winning 2-0 at Middlesbrough.
Conor Chaplin sent them on their way through a deflected 36th-minute strike and Omari Hutchinson slotted home midway through the second half to reward another excellent display from Kieran McKenna's Tractor Boys.
In-form Leeds claimed a sixth win in seven games by beating Blackburn 2-0 at Ewood Park.
Daniel James struck his third goal in as many games before the interval and Crysencio Summerville's ninth of the season 15 minutes from time sealed matters.
Fourth-placed Southampton were denied at the death in a 1-1 draw at Watford.
Che Adams swept the Saints ahead after 56 minutes, but late substitute Rhys Healey equalised for the Hornets in the sixth minute of stoppage time to extend their unbeaten run to three games.
Managerless Sunderland overcame West Brom 2-1 following Tony Mowbray's departure.
Mike Dodds was in caretaker charge at the Stadium of Light and saw Dan Ballard and Dan Neil put Sunderland in the ascendancy.
Albion substitute Brandon Thomas-Asante managed a late consolation for the below-par visitors.
Swansea also began life without sacked manager Michael Duff with a first success in six games, 2-1 at Rotherham.
Millers defender Daniel Ayala was sent off for two bookable
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