Springfield Police responded to a call at the Shrine Mosque early Saturday morning after fights were reported and security could not contain the crowd.
Police say more than 300 people were at the mosque when the brawl started.
One person was arrested after striking an officer and resisting arrest.
Another was injured and refused medical help from responders, but reports say the person went to the hospital with friends.
Authorities say the Shrine Mosque was being rented by a fraternity from a local college but are not sure which school the fraternity is associated with.