A man and two teenage boys have been charged with having pyrotechnics in or near East End Park.
A 24 year old and 15 year old were charged with having lit ones inside the grounds on Saturday during the game against Falkirk.
The man was released and will appear in court in Dunfermline at a later date.
A 14 year old was charged with having an unlit one a short distance from the ground prior to kick off.
The teens will be reported to the youth justice assessor.
Police say an assistant referee was also hurt in the match.
Inspector Neil McGurk said: "Taking pyrotechnics into a sporting stadium is a criminal offence. I'd ask people to think of the impact it could have on those around you, particularly people with medical conditions, young children and elderly.
"We will continue to work in partnership with football clubs to prevent fans from taking pyrotechnics into grounds and to pursue those who put other fans' safety at risk.
“During the match a coin was also thrown from the northwest section of the stadium, striking the assistant referee. Thankfully he was not seriously injured but this type of reckless behaviour will not be tolerated and we are working closely with the club to identify the person responsible.
“Anyone with information regarding this incident is urged to contact Police Scotland on 101.”
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