The FBI on Friday arrested an Omaha man for making threats against Republican Sen. Joni Ernst of Iowa.

According to the arrest affidavit, Robert William Simet, 64, made several threatening comments about Ernst on Wednesday at a motorcycle shop in Pacific Junction, Iowa, where the senator was scheduled to speak.

Simet is accused of telling one employee he "could kill" Ernst at the event, and told another employee that "everyone in the government needs to be killed off."

He also allegedly said he thought Ernst belonged to the Islamic State.

In a separate incident targeting a senator on Thursday, a man was arrested for telling staffers for Sen. Jeff Flake, R-Ariz., that liberals will "solve the Republican problem" by having "better aim," a reference to the shooting at a practice for the congressional baseball game last month.