Scunthorpe gained ground at the top of the Coca-Cola League One table, going level on points with pace-setters Oldham after victory over Yeovil at Glanford Park.
Izzy Iriekpen set the wheels in motion for an Iron victory, heading home Grant McCann's 27th-minute corner.
Terrell Forbes' own-goal then doubled the home side's lead, when he bundled Cliff Byrne's cross past his own goalkeeper.
The result represented a two-point gain on table-topping Oldham after they were held to a 1-1 home draw by Huddersfield.
Town's Ian Craney scored first, after 29 minutes, and it needed Andy Liddell's equaliser five minutes after the restart to ensure Oldham's first dropped point at home this season did not become three.
Leeds continue to move into position for a charge on the promotion places, slipping into third with a 1-0 victory over Hereford at Elland Road.
United came into the game with 14 goals in their previous five outings but could manage just one this time, Andy Robinson the scorer with 18 minutes left.
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