Leeds United were all but relegated to the third tier of English soccer for the first time in their 88-year-history when they drew 1-1 with Ipswich Town at Elland Road on Saturday.
The club could face disciplinary action after a pitch invasion delayed the end of the match.
The draw left them three points behind Hull with an inferior goal difference and just one game to play.
The prospect of playing outside the top two divisions of English football for the first time was clearly too much for some Leeds fans to take and, with just seconds to play, they poured onto the field, forcing both teams to sprint to the safety of the changing rooms.
The match was eventually finished after a 25-minute delay, but Leeds could face a heavy fine if they are found guilty of failing to control the crowd.
Leeds took the lead after 12 minutes when Richard Cresswell headed home and held on until the 88th minute when Alan Lee equalized for Ipswich.
Scuffles were later reported to have broken out between Leeds fans who had stayed in their seats and the pitch invaders. Play eventually re-started with a Leeds corner and the match soon ended in the 1-1 draw.
A Football League spokesman was quoted as telling the BBC: "These actions by a minority of Leeds supporters could have serious consequences for the club.
Leeds, a dominant force in English football in the 1970s under the late Don Revie, are three points behind Hull City with a nine-goal inferior goal difference and one match to play.
It means that Leeds will almost certainly be playing in the third division next season, just seven years after their 2000-2001 Champions League campaign which took them all the way to the semi-finals.
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