(New throughout with sheriff's news conference.)
By Jasper Ward
Aug 26 (Reuters) - A man armed with a high-powered rifle and handgun killed three people at a Dollar General store in Jacksonville, Florida, on Saturday, before shooting himself, in what local law enforcement described as a racially motivated crime.
"He hated Black people," Jacksonville Sheriff T.K. Waters told a press conference.
The suspect, whom Waters described as a white male, was not identified. Waters said all three victims - two men and a woman - were Black.
Waters said authorities believed the shooter acted alone, and that before the shooting he had authored "several manifestos," detailing his hatred for Black people.
(Reporting by Jasper Ward, additional reporting by Patricia Zengerle; Editing by Andrea Ricci, Daniel Wallis and Nick Zieminski)
