Adidas has been forced to take some of its main websites offline after a "sophisticated, criminal cyber-attack" that took place last week, the company said.
Adidas.com, reebok.com, miCoach.com and adidas-group.com all were taken offline, along with various local e-commerce sites, the company said in a statement Sunday.
At least two of the sites, adidas.com and miCoach.com, appeared to still be offline Monday evening. "Due to technical difficulties our website is currently not available," said a message at adidas.com.
The sportswear vendor first learned of the attack last Thursday, it said.
"Our preliminary investigation has found no evidence that any consumer data is impacted. But, while we continue our thorough forensic review, we have taken down affected sites ... in order to protect visitors to our sites," it said.
It didn't provide further details of the attacks or say who was responsible. A note on the miCoach website said Adidas hoped to have the site running again by the end of the day Tuesday.