UPDATE 1-Costco, Sam's Club, others halt photo sites over possible breach
July 20, 2015 at 19:36 PM EDT
TORONTO, July 20 (Reuters) - Costco Wholesale Corp, Sam's Club and a handful of other large retailers have disabled their online photo printing stores in recent days, on concerns about a possible data breach at PNI Digital Media, which manages and/or hosts photo services sites.