Protesters get rowdy in downtown Oakland

A protest march targeting police shootings turned violent in Oakland on Christmas night, reports CBS San Francisco station KPIX-TV.

Some demonstrators in the "No Time Off" march were hostile from the beginning, with one protester lunging at a KPIX camera moments after the march began.

In Jack London Square, around 30 store windows were smashed, and some liquor was looted, the station says.

The Christmas tree in the square was targeted as the protest moved through the city's streets, with ornaments and lights being ripped from the tree.

When the group blocked an intersection near City Hall, one driver lashed out, saying, "When people come from other areas and cause trouble, that's what's frustrating."

About 40 Oakland Police officers monitoring the protest took a hands-off approach, trailing the marchers from behind.