"They were certainly talking points in the tunnel," said Blues head coach Dai Young.
"But the referee has made his decisions and there's no point in me saying anything."
Rush will now face an independent ERC hearing and could be set for an extended suspension. If the no.8 were to be banned it would be a major blow to the Blues who lie third in the Magners League.
Next up for the title-chasing Blues are crunch festive derbies with the Newport Gwent Dragons on December 27 and then the Ospreys on December 31.
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