Police shot a suspected gunman Tuesday on the campus of the University of California, Berkeley, officials said, as hundreds of anti-Wall Street protesters marched on the elite college.
It was unclear if the reported shooting, at the California institution's Haas School of Business, was related to the protests, which came after riot police cleared a camp at Berkeley last week.
The suspect was taken to hospital, said a Berkeley statement, adding that the business school was evacuated and that no other shooters were thought to be involved.
"The suspect was seen carrying a gun and entered an elevator. A staff member reported this to the police, who responded immediately. The suspect then left the elevator and entered a computer room.
"The police followed him and asked him to put up his hands. The suspect then pulled out the gun, and police shot him. The area is now contained, and the Haas School has been evacuated until further notice," it said.
And it added: "The police remain on the scene, and the victim is en route to the hospital. No other injuries have been reported, and there is no indication of other shooters."
The shooting happened as at least 1,000 protesters descended on Berkeley, just outside San Francisco, as part of the two-month-old anti-Wall Street movement, which started in New York.
Authorities have cracked down on a number of high-profile protest camps in the last few days -- including in nearby Oakland on Monday, and in New York earlier Tuesday -- following a series of deaths in or near camps last week.
Two people died in separate incidents in Oakland and Vermont, while two other deaths were reported at protest encampments in New Orleans and Salt Lake City.