Nike is investigating what it described as a “potential cyber security incident” after the World Leaks ransomware gang leaked 1.4 TB of files allegedly stolen from the sportswear giant.

“We always take consumer privacy and data security very seriously,” the company told BleepingComputer in an email statement. “We are investigating a potential cyber security incident and are actively assessing the situation.”

This comes after the extortion group added Nike to its dark web data-leak site, claiming it stole nearly 190,000 files containing corporate data providing information on Nike’s business operations.