Leeds outlined their promotion credentials with a four-goal demolition of struggling Scunthorpe.
Simon Grayson's team scored three times in 12 first-half minutes, before adding a fourth late on.
On-loan Arsenal winger Sanchez Watt fired the home side in front, before Max Gradel coolly doubled the lead and Bradley Johnson rifled the third.
With two minutes left, Leeds substitute Davide Somma rounded off a superb home display with a neat angled finish.
The win means Leeds have lost only one of their last 15 matches and sit fifth in the table and level on points with the two teams directly above them - Cardiff and Norwich.
Scunthorpe, though, have now lost nine of their last 10 games and remain second-bottom of the table, three points clear of rock-bottom Preston, but four points behind 21st-placed Sheffield United.
Leeds seized complete control of the game courtesy of a three-goal first-half blitz, which Watt got underway when he gathered a flick from Luciano Becchio, spun past Paul Reid and drove into the bottom corner.
Three minutes later, Gradel made it 2-0 when he was sent clear by the impressive Robert Snodgrass and calmly rounded Iron keeper Joe Murphy before slotting home.
Snodgrass was central to Leeds' third goal in the 28th minute, when his mazy dribble took the home side deep into the opposition half before he was tackled and the ball fell to Johnson, who hammered in.
Scunthorpe almost pulled a goal back before the break but Michael Collins' effort looped past the post, before Watt came close to grabbing a second with a shot from inside the area that Murphy palmed away.
Scunthorpe substitute Jonathan Forte was unlucky when his drive deflected off Alex Bruce and hit the bar, but Leeds replacement Somma fared better when he scored from an angle to compound the visitors' misery.
90:00+2:36 The referee blows his whistle to end the game.
90:00+1:47 A cross is delivered by Martyn Woolford.
90:00+0:47 The ball is sent over by Eddie Nolan, clearance by Jonathan Howson.
89:09 Corner taken by Michael Collins played to the near post, Paul Connolly manages to make a clearance. A cross is delivered by Michael Collins, Paul Connolly manages to make a clearance.
87:44 Assist by Max Gradel.
87:44 GOAL - Davide Somma:Leeds 4 - 0 Scunthorpe Davide Somma finds the back of the net with a goal from deep inside the penalty box to the bottom left corner of the goal. Leeds 4-0 Scunthorpe.
86:03 Corner taken left-footed by Martyn Woolford, Alex Bruce makes a clearance. Corner from the left by-line taken by Michael Collins, Michael Raynes produces a header from inside the six-yard box that clears the bar.
83:44 The offside flag is raised against Davide Somma. Free kick taken by Joe Murphy.
83:06 A cross is delivered by Max Gradel, Billy Paynter takes a shot. Davide Somma gets a block in.
82:02 Corner taken by Martyn Woolford from the right by-line played to the near post, Andrew O'Brien manages to make a clearance.
81:36 Jonathan Forte takes a shot. Blocked by Alex Bruce.
80:26 Matt Godden crosses the ball, clearance made by Andrew O'Brien.
79:41 Substitution Davide Somma on for Sanchez Watt.
77:59 Drilled right-footed shot by Max Gradel. Michael Raynes gets a block in.
76:35 Eddie Nolan fouled by Sanchez Watt, the ref awards a free kick. Paul Reid takes the direct free kick.
76:35 Substitution Matt Godden is brought on as a substitute for Chris Dagnall.
74:09 Chris Dagnall is ruled offside. Indirect free kick taken by Kasper Schmeichel.
71:29 Jonathan Forte has an effort at goal from deep inside the area missing to the right of the target.
69:08 Jonathan Forte fouled by Andrew O'Brien, the ref awards a free kick. Free kick crossed by Andrew Wright, clearance made by Jonathan Howson.
67:08 The ball is swung over by Paul Connolly, Max Gradel takes a shot from 12 yards. Clearance made by Michael Raynes.
66:14 Jonathan Howson fouled by Sam Togwell, the ref awards a free kick. Direct free kick taken by Kasper Schmeichel.
66:14 Substitution Ross McCormack is brought on as a substitute for Robert Snodgrass.
63:47 Unfair challenge on Bradley Johnson by Jonathan Forte results in a free kick. Kasper Schmeichel takes the direct free kick.
62:57 A cross is delivered by George McCartney. The assistant referee flags for offside against Billy Paynter. Joe Murphy restarts play with the free kick.
62:11 Michael Collins concedes a free kick for a foul on George McCartney. Free kick taken by Alex Bruce.
61:37 Sam Togwell gives away a free kick for an unfair challenge on Sanchez Watt. Direct free kick taken by Andrew O'Brien.
60:50 Billy Paynter has an effort at goal and missed to the right of the goal.
59:34 Billy Paynter concedes a free kick for a foul on Paul Reid. Direct free kick taken by Joe Murphy.
58:29 Substitution Jonathan Forte joins the action as a substitute, replacing Bobby Grant.
57:58 George McCartney delivers the ball, clearance by Michael Raynes.
56:34 The ball is swung over by Robert Snodgrass, Paul Reid manages to make a clearance.
54:48 Free kick awarded for a foul by Andrew Wright on Alex Bruce. Max Gradel produces a shot on goal direct from the free kick.
52:22 The ball is delivered by Sanchez Watt, clearance by Andrew Wright. Bradley Johnson takes a shot. Save by Joe Murphy.
51:19 Centre by Andrew Wright, clearance made by Andrew O'Brien.
50:21 Free kick awarded for an unfair challenge on Bobby Grant by Alex Bruce. Martyn Woolford shoots direct from the free kick, Jonathan Howson gets a block in.
48:22 Bradley Johnson produces a left-footed shot from the edge of the box and misses to the left of the target.
47:59 Robert Snodgrass sends in a cross.
47:30 Robert Snodgrass crosses the ball, Sanchez Watt takes a shot. Save made by Joe Murphy.
46:44 Bobby Grant has an effort at goal from just outside the box which goes wide of the right-hand upright.
46:05 Substitution Billy Paynter is brought on as a substitute for Luciano Becchio.
45:01 The referee blows his whistle to start the second half.
Half Time
45:00+4:01 The referee calls an end to the first half.
45:00+3:02 Free kick awarded for a foul by Bobby Grant on Alex Bruce. Kasper Schmeichel takes the free kick.
45:00+1:32 Max Gradel fouled by Sam Togwell, the ref awards a free kick. The free kick is delivered right-footed by Andrew O'Brien from right channel, clearance by Andrew Wright.
45:00+0:18 The ball is crossed by Robert Snodgrass, Joe Murphy makes a comfortable save.
44:15 Bobby Grant takes a shot from just outside the penalty area clears the crossbar.
43:21 Inswinging corner taken left-footed by Bobby Grant from the right by-line, clearance made by Andrew O'Brien.
42:12 The official flags Bobby Grant offside. Kasper Schmeichel takes the free kick.
41:09 Martyn Woolford delivers the ball, Shot from close range by Michael Collins misses to the right of the goal.
37:48 Cross/shot by Max Gradel, save by Joe Murphy. Corner taken by Robert Snodgrass from the right by-line to the near post, save by Joe Murphy.
32:43 George McCartney produces a cross, clearance made by Michael Raynes. Robert Snodgrass takes a outswinging corner. The ball is sent over by Robert Snodgrass, Michael Raynes gets a block in. Corner from right by-line taken by Robert Snodgrass. Robert Snodgrass crosses the ball, Header on goal by Luciano Becchio from inside the box goes harmlessly over the target.
31:13 Michael Raynes fouled by Max Gradel, the ref awards a free kick. Joe Murphy restarts play with the free kick.
30:03 Max Gradel concedes a free kick for a foul on Andrew Wright. Free kick crossed right-footed by Andrew Wright from right wing, clearance made by Andrew O'Brien.
28:31 GOAL - Bradley Johnson:Leeds 3 - 0 Scunthorpe Goal scored by Bradley Johnson from outside the area to the bottom right corner of the goal. Leeds 3-0 Scunthorpe.
23:37 The ball is sent over by Abdisalam Ibrahim, Kasper Schmeichel makes a comfortable save.
21:07 The assistant referee signals for offside against Robert Snodgrass. Indirect free kick taken by Joe Murphy.
20:42 Andrew O'Brien fouled by Bobby Grant, the ref awards a free kick. Free kick taken by Kasper Schmeichel.
19:26 The assist for the goal came from Luciano Becchio.
19:26 GOAL - Max Gradel:Leeds 2 - 0 Scunthorpe Max Gradel grabs a goal from inside the penalty box low into the middle of the goal. Leeds 2-0 Scunthorpe.
16:43 GOAL - Sanchez Watt:Leeds 1 - 0 Scunthorpe Sanchez Watt finds the back of the net with a goal from just outside the penalty box to the top right corner of the goal. Leeds 1-0 Scunthorpe.
15:41 The ball is sent over by Paul Connolly.
14:32 Free kick awarded for an unfair challenge on Andrew O'Brien by Bobby Grant. Kasper Schmeichel restarts play with the free kick.
11:53 Luciano Becchio handles the ball and concedes a free kick. Joe Murphy restarts play with the free kick.
9:50 The ball is sent over by Robert Snodgrass, clearance made by Paul Reid. Corner taken left-footed by Robert Snodgrass, clearance by Eddie Nolan.
8:40 Corner taken by Robert Snodgrass from the right by-line to the near post, save made by Joe Murphy.
6:53 Foul by Robert Snodgrass on Eddie Nolan, free kick awarded. Direct free kick taken by Eddie Nolan.
6:16 Robert Snodgrass sends in a cross, comfortable save by Joe Murphy.
5:15 Martyn Woolford crosses the ball, Andrew O'Brien makes a clearance.
4:09 Free kick awarded for a foul by Martyn Woolford on Luciano Becchio. Andrew O'Brien restarts play with the free kick.
2:11 The official flags Bobby Grant offside. Kasper Schmeichel restarts play with the free kick.
0:00 The game gets underway.
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