In an extraordinary 633-word retraction, The Los Angeles Times has renounced an article it published last month that claimed to have new information about an attack in 1994 on rap artist Tupac Shakur, who later was killed.

An internal Times investigation confirmed what the Web site The Smoking Gun reported on March 26: The FBI documents that Pulitzer Prize-winning reporter Chuck Philips used to bolster his story were fraudulent. The Times said Philips had believed the documents to be genuine.