By | May 01 2012 3:50 PM

As hundreds of Occupy Oakland protesters planned to march through downtown Oakland for traditional May Day protests, the Oakland Police Department has sought to halt the marchers by blocking off roads and transit. Police began blocking the streets shortly before noon Pacific time, in anticipation of a march planned to begin at 3 p.m. at the Fruitvale BART station, and larger marches converging on Frank Ogawa Plaza at 6 p.m., according to the SF Appeal. Oakland has been the site of the most violent demonstrations in the past, and what happens this afternoon in the city will determine the success of the Occupy movement's attempt to use May Day to reinvigorate the nationwide protests.