At least eight people were shot at a Martin Luther King, Jr. Day celebration in Fort Pierce, Florida, the St. Lucie County Sheriff's office said.Shots were fired over a "disagreement of some sort" following "MLK Car Show and Family Fun Day" at Ilous Ellis Park, said St. Lucie County Sheriff's Office Chief Deputy Brian Hester.It was not clear if anybody was in custody or if a suspect or suspects had been identified, but Hester said police are following multiple leads and tips from the community.Two deputies had been providing security for the event, Hester said, but neither was able to see the shooter or shooters.Hester added that it was "unfortunate and sad that during a celebration for someone who represented peace and equality that a disagreement results in a use of guns and violence to solve that disagreement.""