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Tolso AL BUREAU OF INVESTIGATION Mr..Sultyan IUNICATIONS SEGTI Mr NR020CG AUG05.1970 PLAIN r. 708PM-URGENT8-570.IJK TELETyPE TODIRECTO Mr.h FROM CHICAGOIOC-NEW) Tele.Room Misg Hoime Miss Gandy POSSIBLE'VIOLENCE,XRAVINIA PARK CONCERT, HIGHLAWU PARK, RELIABLE SOURCE ADVISED INSTANT DATETHAT ROCK-CONCERT IS TO BE HELD AT RAVINIA PARK BEGINNING APPROXIMAIELY EIGHT PM INSTANT FEATURING ROCK SINGER JANISXJOPLIN. SOURCE STATES CROWD ESTIMATED IOBE IN NEIGHBORHOOD OF TWENTY THOUSAND PERSONS. SOURCE POSSIBLE ATIEMPIS: IO DISRUPT CONCERT AND CAUSE: VIOLENCE INAREABY UNKNOWN. PERSONS,.POSSIBLY BYSOME OF THOSE INVOLVED .SEVENTY : SOURCE FURIHER ADVISED THAT: RAVINIA PARK AREA INCLUDING ONE HUNDRED ILLINOIS STATE POLICE: AND OFFICERS, F.ROM NEARBY.COMMUNITIES. EX-105 ADMINISTRATIVE- REC- 61 1z AUG 10 1970 SOURCE MENTIONED IS BUREAU AGENTS"ON SCENE. APPROPRIATE AgencIeS AdvIsEd. THE BUREAU WILL: BE KEPT INFORMED OF DEVELOPMENTS. END EBR F9I WASH DC COPY SENT : AIdI. #Dm DEure.