Police were called to a Dockyard night spot early this morning after a fight broke out between locals and visitors.Between 15 and 20 persons were involved in the incident, which occurred around 3.15am.One man was arrested and released without charge.Said a Police spokesman: "At this time the Bermuda Police Service has not received a formal complaint regarding this matter. One male visitor was injured, but he did not require hospital treatment. There were no other injuries reported and no weapons were brandished."In line with our commitment to have additional resources in the Dockyard area during the summer period, the Bermuda Police Service will continue to monitor those levels and respond appropriately."An investigation into the incident is ongoing. Anyone with information is asked to contact the Somerset Criminal Investigation Unit on 234-1010 or the independent and confidential Crime Stoppers hotline on 800-8477.