ɪn fˈɛbɹuːˌɛɹi tˈuː θˈaʊzənd nˈaɪntiːn, ðɪ ˌɛfbˌiːˈaɪ ˈoʊpənd ɐn ɪnvˌɛstɪɡˈeɪʃən ˌɪntʊ "dəmˈɛstɪk tˈɛɹɚɹˌɪzəm" ɐɡˈɛnst ɐ kˌælɪfˈoːɹniə sˈɪvəl ɹˈaɪts ɡɹˈuːp hˌuːz mˈɛmbɚz ɪt kˈɔːld "ɛkstɹˈiːmɪsts" ˈæftɚɹ ɪts tˈuː θˈaʊzənd sˈɪkstiːn ˈɑːltɹˈaɪt pɹˈoʊtɛsts, ɐkˈoːɹdɪŋ tə nˈuː dˈɑːkjuːmənts tʊ wˌɪtʃ sˌʌm dʒˈɜːnəlˌɪst hɐz hæd ˈæksɛs.
In February 2019, the FBI opened an investigation into "domestic terrorism" against a California civil rights group whose members it called "extremists" after its 2016 alt-right protests, according to new documents to which some journalist has had access.