The FBI is warning that al Qaeda may be preparing a series of holiday attacks on U.S. shopping malls in Los Angeles and Chicago, according to an intelligence report distributed to law enforcement authorities across the country this morning. (Click here for full text.)

The alert said al Qaeda "hoped to disrupt the U.S. economy and has been planning the attack for the past two years."

Law enforcement officials tell ABCNews.com that the FBI received the information in late September and declassified it yesterday for wide distribution.

ABCnews.com