The FBI says four people have been arrested, three of them on murder charges, in a weekend shooting that left six people dead and more than a dozen injured in a small Mississippi town. The FBI on Monday announced the arrests of three men and one woman. The FBI says Teiyon L. Powell, William Bryant and Morgan Lattimore have been charged with capital murder, and Latoya A. Powell has been charged with attempted murder. It was not immediately clear of they had attorneys. Authorities have not disclosed a possible motive for Friday night’s shooting in Leland in northwest Mississippi, but the FBI said it apparently arose from a disagreement among several people.