Yorke, who joined Blues from Rovers in August, told manager Steve Bruce that a couple of Rovers fans had racially abused him as he got ready to make a second half substitutes appearance at Ewood Park. "We'll be very disappointed if it shows that there's been any evidence of racism, but if there has, we'll take the strongest possible action. "This is not something that we want to tolerate at Ewood Park."
"We want to talk to the police, we want to talk to our stewards, we want to review all the CCTV footage," said a statement issued by Rovers Cheif executive John Williams.
The FA have also confirmed that they too will be launching their own investigations into the aleged incident.
"We're still establishing the facts and we hope to speak to all interested parties," FA head of media relations Adrian Bevington said.