Witnesses: King's supporters confront Bahrain students
Elsewhere in the strategically important kingdom, riot police fired tear gas at protesters to break up the blockade of a highway, the government said.
A video posted by an opposition party showed police appearing to fire two tear gas canisters at a man standing only a few feet from them. He doubles over after the first shot, and drops to the ground after the second, which appears to hit him in the face.
The man is not obviously threatening the police in the video, which was posted Sunday by Wefaq. The opposition party told CNN it was filmed Sunday near Pearl Roundabout, the center of month-old protests in the kingdom.
About 150 supporters of the royal family tried to get onto Bahrain University campus during the protest there, but only some managed to get in. An unknown number of people were injured, but it's not clear how many or how badly.
Security forces tried to prevent the regime supporters from entering the campus, and allowed people to leave the grounds but not to enter.
According to the state-run Bahrain News Agency, security forces intervened for the safety of students after clashes broke out.
"Some of the university's facilities have been vandalized by the demonstrators in breach of the allegedly claimed peaceful nature of the protests," the news agency reported.
The tense standoff was one of at least three protests Sunday against the rulers of the small Gulf kingdom triggered by popular demonstrations that brought down the long-time presidents of Tunisia and Egypt earlier this year.
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