NEW : Occupy DC reopens . NEW : Protesters vow to stand their ground at Oakland City Hall camp . Protesters have decried the allegations , saying they entered the buildings through open doors . Mass arrests in Oakland among largest in city history , police say . Arrests are reported in Oakland , New York and Oakland .
NEW : Occupy DC reopens . NEW : Protesters vow to stand their ground at Oakland City Hall camp . Mass arrests in Oakland among largest in city history , police say . Arrests are reported in Oakland , New York and Oakland .