Britons on edge; new details emerge

The Times of London reported that Abdullah and Ahmed had written an apparent suicide note explaining their motives.

MI5, Britain's domestic intelligence agency, said on its Web site that some Britons had joined the insurgency in Iraq.

"In the longer term," it said, "it is possible that they may later return to the U.K. and consider mounting attacks here."

Goldman Sachs Threatened   

The FBI is investigating anonymous mailed threats against the Goldman Sachs investment firm but does not consider the warnings to be of "high credibility," an investigator said yesterday.

The letters, handwritten in red ink on loose-leaf paper and signed "A.Q.U.S.A.," were mailed to 20 newspapers, authorities said. The letters contained the warning: "Hundreds will die. We are inside.

You cannot stop us."

A Goldman Sachs Group Inc. spokesman said the firm was working with law-enforcement authorities, adding that authorities told the firm they did not believe the threat was credible.

The letters, postmarked in late June from the New York boroughs of Queens and the Bronx, were being analyzed by FBI and U.S. postal inspectors at the FBI crime lab in Washington, and at the Postal Service lab in Dulles, Va.

The letters were sent to newspapers across the country. The Star-Ledger

of Newark, N.J., is the largest newspaper to

have received one of

the letters.

Goldman Sachs is based

in New York, and has offices in London, Frankfurt, Tokyo, Hong Kong and other cities. About 3,000 people work in its 44-story Jersey City, N.J., tower.

- Associated Press

Staff writer George Anastasia contributed to this article, which also contains material from the Associated Press.