Nicola Sturgeon says she is wary of more positive tests arising following Rangers' fans title celebrations.
Thousands of Light Blues supporters gathered at Ibrox and in the streets of Glasgow as their side clinched the Premiership crown.
The First Minister revealed there has been a small number of cases from people who were in attendance but is worried that more could appear later down the line due to the incubation of the virus.
She said: "We have seen an increase in the last week.
"There have been a small number of cases where people were gathering as part of the football incident last weekend, we may see more of that given the incubation of the virus.
"I think we need to be really open eyed about this and after a year we've probably all learned this.
"This is a virus, so anytime we open up and people started to come together there is great opportunity for transmission. We have seen schools return, it's not such a worry transmission in schools as about the activity that goes around the return of schools."
Jillian Evans, head of health intelligence at NHS Grampian, reiterated Sturgeon's fears and urged supporters who were involved in the incident to book a Covid test.
She added: "I think the advice would be if you were in that situation or part of those crowds, get tested
"That would be an important thing you could do to try to minimise any further harm.
"We may still see the result of transmission in the coming week.
"I know the numbers in Greater Glasgow and Clyde did go up last week but it may be too soon to say whether that was the result of crowding in that situation.
"It was outdoors, that was good but lots of people were shouting close-by so that's not good. It's not the behaviour we want to encourage at any point right now.
"The public health message from that would be, if you were around that or with people who were around it then being vigilant and being tested in community testing would be a good thing to do right now."
