Celtic Park was momentarily plunged into darkness during the Scottish Premiership match between Celtic and St Mirren on Sunday.
A huge power cut saw floodlights, stand lighting, advertising boards and VAR equipment fail.
It's reported Celtic PPV coverage of the fixture was also interrupted as a result of the power cut.
Images from the stadium show the moment floodlights failed as the match was temporarily halted as referee Grant Irvine spoke with both Brendan Rodgers and Stephen Robinson.
The outage appeared to have caused VAR issues with the match official discussing how to proceed with the match before power returned to the stadium after a short delay.
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BBC commentator Alistair Lamont explained: "Wow. Power cut momentarily at Celtic Park. Actually, no idea if you're still with us.
"I'll keep talking just in case - every single light at Celtic Park went out there! I'm not sure if we're still on air, I've never witnessed anything like this! It is a big power cut!"
Andy Burke then added on BBC: "For a few seconds Celtic Park is plunged into almost complete darkness as the floodlights cut out!
"A few gasps from the crowd followed by an ironic cheer as the lights come back to life a few seconds later."
A Celtic TV update read: "Due to an external power outage in the Parkhead area our broadcast has been interrupted.
"The match is continuing thanks to the stadium’s emergency generator. We hope the issue is resolved shortly and we can restart our broadcast.
"The electrical power issue in the area is still ongoing.
"There is currently no power at Celtic Park other than what is connected to the emergency power supply (floodlights etc)."
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