A mass pyro display at Celtic Park has threatened to trigger a suspended SPFL sanction against Celtic.
Ahead of the final league match of the season against St Mirren, members of the Green Brigade staged a mass pyro display inside the stadium.
Strobes and green, white and orange smoke bombs were set off in the safe standing section at Parkhead moments before kick-off.
A banner with a no-entry sign over Celtic chief executive Michael Nicholson was also unveiled by the supporter group.
A banner read: "Fan engagement up in smoke".
The display comes despite a warning to Celtic over a reduced ticket allocation for their next Premier Sports Cup game at Hampden, should there be another breach of SPFL rules.
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As the Scottish Premiership match falls under the SPFL governance, the club could have the suspended punishment of an 800-ticket reduction triggered as a result of the display.
Celtic received an immediate 500 ticket reduction for a breach of pyro rules ahead of the Premier Sports Cup final.
Should the suspended punishment be triggered by the display at Celtic Park, then Celtic could have their allocation for the next Premier Sports Cup match at Hampden reduced by 1,300 briefs.
Celtic were found to have breached SPFL Rule H34 in respect of both the semi-final and final of the Premier Sports Cup, in 'failing to ensure, as far as is reasonably practicable, that their supporters did not engage in “unacceptable conduct” at those matches'.
The club have, therefore, because of the semi-final, been handed a suspended sanction of a reduction of 800 tickets for a future Premier Sports Cup at Hampden Park in the event of another breach of SPFL Rule H34 through pyrotechnic use by supporters in any SPFL competition before March 30, 2027.
