Leyton Orient's League One match against Lincoln City was halted after 84 minutes on Tuesday due to a medical emergency in the stands.
A Leyton Orient fan rushed onto the pitch to notify the referee about the situation before several supporters sat on the field to impede the game from resuming.
According to British media reports, medical personnel administered CPR beside the pitch before the game was stopped.
The match was officially called off an hour after the play was initially halted, with Leyton Orient holding a 1-0 lead.
“The thoughts of everyone at Leyton Orient Football Club are with the individual involved and their loved ones at this distressing time,” Leyton Orient said in a statement.
“The club would like to thank all supporters in attendance at Brisbane Road this evening for the understanding and compassion shown during a very difficult situation.”
The English Football League (EFL) stated that a decision regarding the rescheduling of the match would be made after consulting with both clubs.
