A former journalist fired for making up details in his stories is behind at least eight of the scores of threats made against Jewish institutions nationwide, federal officials said Friday.

Juan Thompson, 31, was arrested in St. Louis and was tol appear in federal court in Missouri on Friday afternoon on a charge of cyberstalking, reports the Dallas Morning News.

Authorities say Thompson committed the crimes in an effort to frame and harass his ex-girlfriend.

Federal officials have been investigating 122 bomb threats called in to nearly 100 Jewish Community Center schools, child care and similar facilities in three dozen states that began Jan. 9.

Thompson's threats allegedly began Jan. 28 and included a bomb threat to New York's Anti-Defamation League.

Authorities continue to investigate threats from the previous three weeks.