DAVENPORT, Iowa (AP) -

A Davenport man has pleaded not guilty to charges in connection with the assault of a man at a county courthouse.

Court records filed last week show 46-year-old Jimmy Lightner pleaded not guilty to willful injury causing bodily injury and going armed with intent. He also is charged with an aggravated misdemeanor of interference with official acts causing bodily injury.

Surveillance video at Scott County District Court in early May shows Lightner attacking a man and chasing him into the courthouse's security area.

The Quad-City Times reports Lightner was detained as he tried to get through the metal detector. He had a 5-inch blade duct-taped to his forearm and a pocket knife. Authorities say he did not know the victim.

A message for Lightner's attorney was not immediately returned.