A Stirling Albion fan was struck with a coin during the club’s match against Rangers.
The 16-year-old boy was hit with the object at half time during the Third Division game at Ibrox on Saturday.
Strathclyde Police confirmed it was made aware of the incident at around 4pm during the match that kicked off at 3pm.
In response, Stirling Albion issued a statement that described the incident as "disappointing in the extreme".
Stuart Brown, operations director of the Stirling club, said in a statement released on the club’s website: "It is disappointing in the extreme that a headline arising from Saturday’s game versus Rangers should be in connection with one of our young fans being struck by a coin rather than the focus being about our battling performance that arguably came within a couple of inches of pulling off a remarkable draw.
"I have spoken this morning with the head of security at Rangers FC and I have been assured that he is fully aware of the incident that took place, during the half time interval, having been advised by the police. A full investigation is being undertaken, including a review of the CCTV footage.
"The police are treating this as criminal offence and if the individual(s) concerned can be formally identified, further action will be taken. Rangers have also given me the assurance that anyone found guilty of such an offence will be banned for life from attending matches at Ibrox. I will communicate further on this matter when the outcome of the investigation is known.
"In the meantime, I’ve been in contact with the young fan and his father to update them on developments as described above and to offer my apologies on behalf of SAFC that he should be subjected to such a vile act, perpetrated by a mindless idiot for whom I hold nothing but contempt. As ever in football, it is disappointing that a small minority let down the great majority."
A police spokeswoman confirmed enquires are continuing into the incident.
She added: "We were alerted around 4pm that a 16-year-old male had been hit by an object, believed to be a coin, while attending the Rangers against Stirling Albion match."