Sheffield United extended their lead at the top of the Championship with a 2-0 win over Plymouth at Bramall Lane, while Republic of Ireland international Andrew Moran was on the mark for Stoke City in their draw with Cardiff City.
Gustavo Hamer fired the Blades into a 19th-minute lead before substitute Kieffer Moore slotted in a penalty with two minutes left.
The Blades sit three points clear of Leeds, who had earlier struck a stoppage-time equaliser to draw 1-1 at Preston.
Brad Potts put Preston ahead in the 23rd minute but Leeds' second-half pressure eventually told when Mateo Joseph went to turn in a low cross, with the final touch coming off Preston defender Jack Whatmough for an own goal.
Sunderland fought back from 2-0 down to win 3-2 at Swansea to go third.
The Swans had looked in control after an early goal from Zan Vipotnik and Liam Cullen's free-kick.
Sunderland pulled one back before the break from defender Dan Ballard's diving header and were level in the 73rd minute when Dan Neil rifled home a fine individual effort before Jobe Bellingham completed the turnaround two minutes later.
Blackburn kept themselves in the play-off chase with a 2-0 win over Luton, who ended the game with 10 men.
On-loan Brighton winger Amario Cozier-Duberry put the hosts ahead and Owen Beck doubled the lead just before half-time.
Luton substitute Liam Walsh was shown a straight red card in the 73rd minute as Rovers closed out a sixth straight league win.
Stoke captain Ben Gibson hit a stoppage-time equaliser to rescue a 2-2 draw against Cardiff - having earlier scored an own goal.
Andrew Moran put the Potters ahead on 17 minutes, but Anwar El Ghazi had the Welsh side level before the break.
Neil Harris saw his final game as Millwall manager end
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