Customers in China of Apple's online music service, iTunes, say they have had trouble downloading music this week, raising concerns that the Chinese government has blocked the Web site.
Customer complaints started appearing in online forums on Monday, a day after a New York-based pro-Tibetan group (the Art and Peace Foundation) released a new album called "Songs for Tibet."
The album features songs from Sting, Alanis Morissette and other artists, and it highlights what activists see as the widespread repression of the Tibetan people by the Chinese government.
A spokeswoman for Apple in Beijing said the company is aware of the problem, but she said she could not give any more information at this time.
China encourages Internet use for education and business, but is known for blocking Web sites that contain politically sensitive content.