An elusive bomber whose recent victims include noted scholars leaves the initials "FC" on the bombs and may pick targets from the pages of newspapers, the New York Times reported. The information is one of the first breaks in the case of "one of the most creative and elusive bombers ever encountered," federal investigators told the newspaper. The investigators said the bomber engraved "FC" into exploding packages that last month injured professors at Yale University and UC San Francisco. The initials were designed to survive the blasts, according to sources quoted by the newspaper. A letter to the paper last month that promised more information on the bombing also was signed "FC."