Android OEM OnePlus says it's investigating claims of credit card numbers being stolen from customers who have purchased a phone from OnePlus' site.

Over the weekend, a customer claimed on a thread on the OnePlus forums that recent credit card fraud he experienced was connected to his OnePlus purchase. Almost 100 people have chimed in on the thread's poll, claiming they too experienced fraudulent charges after making a OnePlus purchase.

A FAQ from OnePlus says its e-commerce platform is built with "custom code" and that "card info is never processed or saved on our website." It says credit card data is "sent directly to our PCI-DSS-compliant payment processing partner over an encrypted connection, and processed on their secure servers.​"

OnePlus said, "This is an ongoing investigation. We are working with our third-party providers and will update you on our findings as they surface."

At the time of this post, it appears OnePlus is still processing credit cards through its website.

If you purchased an item from OnePlus.net, keep an eye on your credit card transactions.

Update: It's a day later, and OnePlus has suspended credit card transactions through its processor. PayPal is still available, though.