The Foxes looked to be heading for victory before substitute Connor Roberts levelled in the 80th minute and teenager Archie Gray sparked pandemonium moments later when his deflected strike beat Mads Hermansen at his near post.
With Leicester losing their discipline, Dan James’ 20-yard free-kick in stoppage time bounced off Patrick Bamford and in to move second-placed Leeds to within six points of Leicester.
In an action-packed encounter at Elland Road, the visitors took a deserved lead when Wout Faes, who had the final touch on Gray’s strike, headed in unmarked from a corner.
Enzo Maresca’s men started the second half as they did the first and Stephy Mavididi drew a good save from Illan Meslier in the Leeds goal, before Patson Daka wrongly had a goal ruled out for offside after Jannik Vestergaard’s towering header came back off the crossbar.
Daka was onside when Vestergaard made contact with the ball and Leeds’ Georginio Rutter then deflected the rebound into the Leicester man’s path before he fired into the net.
The Zambian striker missed a brilliant chance to make it 2-0 when he shot wide when played in on goal and that miss proved to be very costly as the Foxes fell to a second straight defeat.
