SAN DIEGO - A Russian-born U.S. citizen who sent threatening emails to the courthouse in El Cajon pleaded guilty Wednesday to a felony charge of making a false bomb threat.

Georgiy Chipunov, 28, will be sentenced on Jan. 22 to a year in jail.

Retired Sacramento County Judge Jeffrey Gunther ordered Chipunov to stay away from El Cajon Judge Charles Ervin for the next three years.

Chipunov, who was on probation for felony evading at the time, went on a rant about something going on at the courthouse when he sent the threatening email, Deputy Public Defender Troy Britt said

The defendant was detained Aug. 16 in Tijuana and turned over to U.S. authorities.

A news release from the Baja California Public Safety Secretariat described the defendant as "a dangerous Russian terrorist" who had "threatened to explode the installations of the court in San Diego ... as well as kill judges and officials."

The threats led to the closing of the courthouse for two days, according to the statement.