(Reuters) -Twelve people were injured, 10 of them by gunfire, in a shooting that erupted on Saturday inside a shopping mall in Columbia, South Carolina, and three people were taken into custody, police said. Columbia Police Chief William Holbrook said the shooting at the Columbiana Centre mall was not believed to have been a random act of violence but rather stemmed from “some kind of conflict” among a group of armed individuals who knew each other. However, details surrounding the shooting remained sketchy, he said. Local media outlets reported a heavy presence of police and emergency personn…