Chris Wood struck deep into injury time to slow Newcastle's promotion drive as Leeds escaped from St James' Park with a point.
Wood stabbed home his 25th goal of the Sky Bet Championship season five minutes into stoppage time to snatch a 1-1 draw just as it looked as though Jamaal Lascelles' 67th-minute header had taken the Magpies to the brink of an instant promotion back to the Premier League.
Rafael Benitez's men are eight points ahead of third-placed Huddersfield with four games remaining - the Tykes have one in hand - but are now four points adrift of leaders Brighton, while Leeds have strengthened their grip on a play-off berth.