Computer hackers have struck PGA of America servers at this week's 100th PGA Championship, demanding a Bitcoin ransom to unlock files without risking data not easily replaced, Golfweek's website reported.

The files, Golfweek said, contained digital promotional banners and logos used on signs around Bellerive as well as materials for next month's Ryder Cup in France. The PGA of America does not intend to meet extortion demands, unnamed sources told the magazine, and the organization has retained outside information technology experts to ensure the year's final major tournament remains unaffected, according to the report.