PORTLAND, Maine — A 50-year-old Portland man charged with threatening Gov. Paul LePage and members of Congress is being held without bail.

Michael Thomas pleaded not guilty on Friday to charges of sending threatening letters to LePage, U.S. Rep. Steve King, R-Iowa, and U.S. Sen. Joe Lieberman, I-Conn. He also was charged with being a felon in possession of a gun.

Court records say police identified Thomas as a suspect through DNA from the LePage letters. He’s accused of sending three letters in which the author said he was willing to sacrifice his life to shoot the governor.

The Portland Press Herald says Thomas was arrested March 25 at his apartment at the Loring House, a residence for senior citizens and people who have disabilities. A trial is set for June 6.