Updated

Some lucky person walked into a Publix supermarket in suburban Florida over the past few days and bought a winning Powerball ticket now worth an estimated $590.5 million. The jackpot is the highest in Powerball history.

On Sunday, residents of the small city of Zephyrhills wondered who the winner might be. The ticket-holder hadn't come forward yet. The store and parking lot were abuzz with activity and TV live trucks. A call to Publix's headquarters in Lakeland, Fla., was not immediately returned.

Zephyrhills is a small city in Pasco County, about 30 miles northeast of downtown Tampa. Once a farming town, it's now known for skydiving and retiree mobile home parks. It's also home to Zephyrhills bottled water.

A lottery official said the ticket-holder would be Florida's sixth Powerball winner.