By Sara Germano

Adidas AG said Thursday that a "few million" customers shopping on its U.S. website may have had their data exposed to an unauthorized party.

Neither the specific number of users affected nor the time frame of the potential breach were immediately disclosed, but the German sportswear maker said it became aware of the issue on Tuesday and has begun a forensic review.

Adidas said they are alerting "certain customers who purchased on adidas.com/US" and that, according to the company's preliminary examination, data affected include contact information, usernames and encrypted passwords.

"Adidas has no reason to believe that any credit card or fitness information of those consumers was impacted," the company said.

The sportswear maker is the latest in a string of consumer and financial firms to report data breaches in recent years, including rival Under Armour Inc., which in March disclosed that some 150 million users of its fitness-tracking apps had their personal information exposed.

Also this spring, department stores Saks Fifth Avenue and Lord & Taylor said hackers had breached their payment systems and stole credit card information for millions of shoppers, according to the chains' corporate parent Hudson's Bay Co.

Write to Sara Germano at sara.germano@wsj.com

(END) Dow Jones Newswires

June 28, 2018 13:58 ET (17:58 GMT)

Copyright (c) 2018 Dow Jones & Company, Inc.
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