Riot police used tear gas Wednesday to break up a demonstration by college students in the Guatemalan capital.

A spokesperson for the volunteer firefighters told journalists that a television reporter was injured when he was struck by projectiles the protesters were hurling at police, while protest leaders said one student was shot by the cops.

Students at San Carlos University demonstrated in solidarity with prospective teachers who were removed by force on Tuesday as they blocked a busy Guatemala City thoroughfare to protest proposed changes in teacher training.

The protesters greeted police with "a rain of stones," forcing the officers to use tear gas in self defense, Interior Minister Mauricio Lopez Bonilla said after Wednesday's disturbances.

Carlos de Leon, secretary of the Association of University Students, accused police of shooting at protesters and said the government is using "repressive mechanisms of the past instead of resolving the problems."

The students blocked streets near the campus with burning tires and pelted cops with bottles and other projectiles.

The current round of student protests began two months ago in response to the Education Ministry's controversial plan to overhaul the curriculum for teacher training. EFE