Starbucks suffered a major computer system failure late Friday that took down its sales systems at stores throughout the U.S. and Canada.
The problem was caused by a failure during a daily system refresh, the company said in a statement. It didn't offer additional technical details.
On Saturday, the company said the issue had been resolved, and all its stores in the U.S. and Canada were open for usiness as usual.
The outage also affected Starbucks' Evolution Fresh and Teavana stores.
Stores in Boston, New York, San Diego, Vancouver and other cities were affected, judging from hundreds of customer and employee posts on Twitter. Some stores gave away drinks, only accepted cash, or have closed, according to the messages.
In San Francisco, an employee at one store said they were offering free drinks, though he did not offer many other details.
The company operates one of the biggest retail networks in the U.S. and has expanded to many countries around the world. It counts more than 22,000 stores worldwide and serves millions of customers each day.
On Thursday, Starbucks posted total revenue of $4.56 billion for the fiscal second quarter, up 18 percent from the same period last year. It netted 210 new stores during the quarter.
Not every single store was affected by the computer failure. In Phoenix, Arizona, a worker at one store said their systems were fine, although their credit and gift card readers went down last weekend, he said.