Update: FC Porto has denied the allegations. Comment added below.

Football fans in Russia were abruptly blocked from watching FC Krasnodar spring a major upset against FC Porto Tuesday after the Portuguese side reportedly spiked the price for broadcasting rights before the game, Russia’s Match TV sports broadcaster has alleged.

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The Russian side secured a 3-2 victory against the Portuguese side in Porto on Tuesday, advancing to the third round of qualifiers in the UEFA Champions League on away goals after losing the home leg 0-1. 

Match TV, which was scheduled to broadcast the match in Russia, faced a social media storm from fans when it announced that the broadcast was canceled “for reasons beyond our control,” minutes before kickoff.