BOSTON (CBS/AP) — A Los Angeles man has pleaded not guilty to making a series of phone calls threatening to kill journalists at The Boston Globe.

A federal grand jury indicted 68-year-old Robert Chain of Encino last week. He was arrested at his home August 30.

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Robert Chain outside court on September 24, 2018 (WBZ-TV)

Chain is charged with making 14 threatening calls to the Globe newsroom between Aug. 10 and Aug. 22. They started after the Globe appealed to newspapers across the country to condemn President Donald Trump’s attacks on the media.

A Boston Globe editorial criticizing President Trump’s description of the media as the ‘enemy of the people.’ ((Photo by Tim Bradbury/Getty Images)

Prosecutors said 20 guns were seized during a search of Chain’s home but they didn’t indicate whether any of them are believed to be illegally owned.

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If convicted of the threats, Chain faces up to five years in prison.

Chain was freed from custody last month after agreeing to pay $50,000 if he violates any terms of his release.

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(© Copyright 2018 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)