The affected products include USB charging cables, battery chargers, office equipment and other inexpensive accessories. One particularly problematic product, according to CNN, was a voice-enabled microwave that “began sparking and smoking” as soon as it was turned on by researchers tapped by CNN to investigate the product. 

CNN notes that in some cases the product in question wasn’t even being used when it caught fire or appeared to overheat. The source of the issues wasn’t immediately clear. But for some products the problems were widespread enough that they were reported by dozens of people who bought the same item.

Amazon has since discontinued some of the products identified by CNN, but continues to sell other items named in the report — even after multiple customers say the product melted, sparked or otherwise posed a safety hazard. 

In a statement, an Amazon spokesperson said “safety is a top priority,” and the company is “confident that the AmazonBasics Microwave is safe to use.” “The appliance continues to meet or exceed all certification requirements established by the FDA, UL, FCC, Prop 65, and others for safety and functionality,” the spokesperson said. Amazon also pointed to a recent blog post about the safety of Amazon Basics.