A ransomware attack on supply chain vendor Blue Yonder has impacted Starbucks in the U.S. and supermarkets in the U.K. — Here’s what we know so far.

A ransomware attack against a major supply chain technology provider left retailers including Starbucks and U.K. grocery chain Sainsbury’s scrambling to manage operations including scheduling and handling inventories.

Blue Yonder, which provides supply chain management software for thousands of companies, said a cyberattack had disrupted some services.