The Colorado Senate has fired an unpaid intern accused of "glitter bombing" Republican presidential candidate Mitt Romney after the Colorado caucuses.

College student Peter Smith, 20, was fired Thursday afternoon. Police say Smith threw glitter at Romney as the candidate greeted supporters in Denver Tuesday night.

Smith is a student at the University of Colorado Denver who was interning in the Democratic Senate as part of a college course. Smith's boss, Senate majority office chief of staff John Cevette, says that Smith was terminated after a staffer alerted him to the incident.

Cevette said student interns are not chosen by Senate President Brandon Shaffer, a Longmont Democrat. He could not say whether Smith would lose course credit.

Smith faces charges of causing a disturbance, throwing a missile and unlawful acts.