SALT LAKE CITY — Police say a man who went to church with a group of acquaintances, only to become angry about what was being preached, was arrested for making a terroristic threat.

Gary Mills, 44, was booked into the Salt Lake County Jail Monday for investigation of threat of violence.

West Valley police officers were called to a meetinghouse of The Church of Jesus Christ of Latter-day Saints at 4251 S. 4800 West on Sunday where Mills had gone to church with a group of students from a nearby trucking company.

During the service, a witness observed Mills get up and leave while a hymn was being sung about Zion, a police affidavit states. The man followed Mills outside.

"The witness advised he observed Gary to be agitated and asked him what was wrong. Gary proceeded to throw his hat on the ground in anger and told the witness he was mad about the church preaching Zionism," the affidavit states.

Mills then said that "it was a conspiracy theory from the government, the Jews stole the land from the Palestinians, the Jews control most of the world through central banking. Gary told the witness, 'I would be ready to take up arms and bomb federal buildings,'" according to the report.

That statement made the witness nervous, so he called police, who in turn called the FBI, the affidavit states.

When agents attempted to interview him, "Gary did speak about not watching mainstream media and only being interested in Iranian or Russian TV through YouTube," according to the report.

The FBI told West Valley police that they "will be watching Gary and do further investigation." The officer arrested Mills "due to Gary making a threat to use a bomb on federal buildings," according to the affidavit.