Fans of the singer formerly known as Cat Stevens are coming to his defense, after he was denied entry to the US. A statement posted on a fan-supported Web site says Yusuf Islam being on a government watch list "is certainly an error." The statement also calls it a "sad state of affairs" when "a peace-loving pop star can be grouped into the same category Osama Bin Laden just because of his chosen faith." Islam's flight from London to Washington, DC, was diverted to a Maine airport yesterday. He was questioned by the FBI and immigration officials. US officials say he's being denied entry on "national security grounds" and will be sent back to London today. Last year, Islam released two songs, including a re-recording of his '70s hit "Peace Train," to express his opposition to the US-led war in Iraq.