Riot police have clashed with about 200 protesters who rallied in downtown Sydney as part of global demonstrations against an anti-Muslim film produced in the United States, AP said.

Ten Network television news showed a policeman knocked unconscious and reported several people injured among the mostly male crowd Saturday, September 15 that targeted the U.S. Consulate.

Police would not immediately confirm injuries or say whether arrests had been made. Police used pepper spray against protesters, some of whom chanted: "Obama, Obama, we love Osama."

U.S. diplomatic posts around the world have been targeted in recent days by protests against the film, which ridicules the Prophet Muhammad.