Oakland police are threatening to raid Occupy Oakland. A tweet by the protest group posted just before we went to air reported that police in riot gear had surrounded the encampment and began firing flash grenades and rubber bullets into the camp. [UPDATE: Oakland police stormed the Oakland Occupy protest encampment outside City Hall just before 5 a.m. PDT. Police lobbed flash grenades and reportedly fired tear gas. Initial reports say at least 70 people have arrested and the police tore apart the protest camp.]