Ghana striker Jeffery Schlupp scored for English Championship side Leicester City but a controversial 90th-minute penalty earned Birmingham a 2-2 draw to further damage Leicester's flagging Championship play-off hopes.
After trailing at the break thanks to a Curtis Davies own goal, Birmingham levelled through Nikola Zigic.
Leicester's Jeff Schlupp got on the end of Matty James's corner to power home a header 15 minutes from time.
But Chris Burke equalised from the spot after David Nugent fouled Wes Thomas, despite replays showing it was outside the box.
Schlupp, denied by two stunning tackles from Davies and Paul Robinson, then blasted against the bar before grabbing what looked likely to be the winner when he met James's corner to bullet home a header from six yards.
But, just as the game was set to move into injury time, visiting substitute Thomas went down under Nugent's challenge and fellow Blues sub Burke slotted home the spot-kick.
Watch video of Schlupp's post match interview below