Chesterfield's League Two game against Lincoln was stopped to allow an air ambulance to land on the Proact Stadium pitch after a supporter was taken ill.
The game was goalless after 26 minutes when the referee paused the action.
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Chesterfield announced on Twitter: "The game has been stopped here at the Proact, due to an incident involving a supporter sitting in the East Stand, who's receiving medical treatment.
"An air ambulance will shortly be landing on the pitch.
"Our thoughts with the supporter involved and their family at this time. We wish them a speedy recovery."
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The supporter was treated on the field for just over 20 minutes before the air ambulance left the stadium and was met by a round of applause from both sets of fans.
The match was restarted following short warm up routines from both teams.