MINNEAPOLIS (AP) — A federal grand jury has indicted a Minnesota woman on charges of threatening Vice President Joe Biden and other federal officials.

The indictment expands the case against 47-year-old Kim Rolene Hutterer of New Prague, who was charged in a criminal complaint last month with threatening an FBI agent who arrested her 20 years ago when she threatened to bomb a passenger airliner.

The indictment filed Wednesday accuses Hutterer of mailing letters last October threatening to kill the vice president and FBI Special Agent Dean Scheidler in Minneapolis. Prosecutors say Hutterer sent an 11-page, handwritten letter, with five additional pages of drawings, threatening to injure and kill Scheidler and others. The indictment says Hutterer mailed similar threats to Scheidler on March 29 and that she made a telephone threat to an employee at a federal prison in Welch, W.V., last September. An attorney from the Office of the Federal Defender did not immediately return a call seeking comment on Hutterer’s behalf.