UPDATE 5-Winners of $1.6 bln U.S. Powerball jackpot still officially unknown
January 14, 2016 at 20:11 PM EST
LOS ANGELES, Jan 14 (Reuters) - Three ticket holders with a claim on a record $1.6 billion Powerball jackpot were laying low on Thursday, their identities officially still a mystery even as lottery officials revealed the retailers in California, Florida and Tennessee that sold them the lucky tickets.