A Texas Christian University professor accused of threatening co-workers and hinting about taking a gun to campus has been found incompetent to stand trial.

Charles Frederick Bond Jr., 53, will be sent to a mental health institution for further evaluation.

Judge Brent Carr made the ruling Tuesday after an agreement by prosecutors and defense attorneys, the Fort Worth Star-Telegram reported in its online edition Tuesday.

Bond, a tenured psychology professor, has been jailed without bail since his June 1 arrest at his Fort Worth home after police said he hinted about bringing a submachine gun on campus.

He was charged with making a terroristic threat, a misdemeanor punishable by up to 180 days in jail.

According to an arrest warrant affidavit, Bond sent harassing e-mails and made alarming statements to various TCU officials.

"Is it possible a sexist could snap and bring an uzi gun on the TCU campus?" Bond allegedly wrote in an e-mail to numerous TCU employees. "Might he target young women? Might others get in the way?"

According to the affidavit, on May 25, Provost Nowell Donovan told Bond not to make contact with anyone at TCU pending an investigation about his behavior.

Bond then sent e-mails to a large number of employees, calling Donovan a "sexist pig," the affidavit stated. Then on May 27, Bond wrote two school officials that he would bring a gun to campus, police said.