Valleywag is reporting that Apple CEO Steve Jobs is undergoing surgery at Stanford Hospital on Monday.
The report did not explain what type of surgery Jobs might be having. It cited a secondhand account passed along from a employee at Stanford.
Jobs is currently on medical leave from Apple while he recuperates from health problems that have caused him to lose significant weight over the last year.
Bloomberg reported two weeks ago that Jobs was considering a liver transplant. A Stanford Hospital representative would only say that "due to federal patient privacy laws, we're unable to provide any information on any patient."
Apple declined to comment on what a representative called rumors and speculation.