NEW YORK - Police concerns that media-hungry terrorists would target Michael Jackson's trial as a "soft target" led to a request for federal help, according to FBI files kept on the late pop star and made public yesterday.

The documents also show that the FBI helped facilitate interviews in the Philippines by California authorities investigating Jackson over allegations that he had sexually abused boys.

The documents, dating from 1992 to 2005, were made public through a Freedom of Information Act request from the Associated Press and other news media after Jackson's death June 25, at age 50.

The FBI initially said it had 600 pages in its files but released 333 pages, citing privacy rules and the desire to protect investigative techniques.

The FBI monitored Jackson for more than a decade, but the files contain no startling revelations about his private life and the bureau apparently never developed any solid evidence against him of wrongdoing.

In 2004, the Santa Maria Police Department in California asked for FBI "involvement" after Jackson was arrested for child molestation.

Police, according to the FBI, said they believed the courtroom would be a "soft target" for terrorism because of the "worldwide media coverage" the trial would attract.

The FBI concluded there were no threats.

Back in September 1993, an investigator from the Los Angeles Police Department and another from the Santa Barbara Sheriff's Office arrived in Manila to speak to two former employees of Jackson's Neverland ranch who claimed they saw the singer fondle young boys.

Their trip came after the LAPD had asked the FBI if it wanted to work a possible case against Jackson for transporting a minor across state lines for immoral purposes. The FBI checked with the U.S. Attorney's Office, which declined.

The files say an FBI agent accompanied the California officials to the first interview to make sure there were no problems.

In March 2004, the Santa Barbara County district attorney's office reached out to the FBI, seeking help in developing a strategy to prosecute Jackson for molesting a 13-year-old cancer survivor. Jackson was acquitted in the high-profile case.

The FBI reviewed case notes from local authorities and examined 16 computers taken from Jackson's home. Nothing notable was described as being found on the hard drives, though parts of the files are redacted.

The files include death threats against Jackson, then-President George H.W. Bush and mob boss John Gotti that led to the 1993 sentencing of Frank Paul Jones, who allegedly was obsessed with Janet Jackson, Michael's sister.

A letter obtained by the FBI, dated July 6, 1992, states: "I decided that because nobody is taking me serious, and I can't handle my state of mind, that I am going to Washington D.C. to threaten to kill the President of the United States, George Bush."

The letter also says, "Michael [Jackson] I will personally attempt to kill, if he doesn't pay me my money."

One of the documents, written by the L.A. City Attorney's office, indicated on June 22, 1992, that the author of the letter "arrives in Calif." and "Threatens to kill." The FBI includes an interview with an unidentified "victim," whose name is redacted but presumably Michael Jackson, who states that he was aware of the threats and took them seriously.

According to a 1992 Associated Press story, Jones was arrested June 22 and held on $15,000 bail for investigation of trespassing in the driveway of the Jackson family compound in Encino, Calif. The following year, he was sentenced to two years in prison for "mailing a threatening communication," according to a 1993 press report included in the FBI files.