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Key as so. | 2... BUREAU OF INVESTIGATION 1 i pote 2/27/72 Detective aes perro Bomb and Arson | Squad, Pittsburgh Police Depar ent, advised as follows: He sated that on the a y 9, 1971, his Squad was notified that Manager, Nixon Theater, Pittsburgh, Pa., received a eatening letter addressed to the Manager of the Nixon Theater concerning the play, "Hair." He stated that he answered the i complaint and at that time obtained the original letter and \ envelope frou He stated that his squad was a continuing its Investigation of the bomb threat but had developed no suspects, The letter and envelope were obtained from Detective at that time and a receipt was furnished te hin, " ‘on 2/10/71 _o)_Pitteburgh, Pa. ___File#_pi ttobungh-o-2944 ts document contoins neither recommendations nor conclusions of the FBI It Is the property of the FBI ond Is loaned to your agency; itond Its contents ore not to be distributed outside your agency. i