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Coverage dated October 15, 2026

Letters with ‘suspicious' substance sent to congressional and election offices nationwide

Headline from NBC Boston

The Oklahoma State Capitol, which houses the Oklahoma Legislature and executive branch offices, on June 8, 2026, in Oklahoma City.

NBC Boston's own description from its feed. We collect headlines and these descriptions, not full articles; read the original reporting below.

Earlier updates in this story

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7 articles, oldest first.

  1. NBC Boston

    Letters with ‘suspicious' substance sent to congressional and election offices nationwide (opens NBC Boston)

    Published

    NBC Boston's feed description

    The Oklahoma State Capitol, which houses the Oklahoma Legislature and executive branch offices, on June 8, 2026, in Oklahoma City.

  2. NBC 5 Dallas-Fort Worth

    Authorities investigate letters with ‘suspicious substances' sent to election offices (opens NBC 5 Dallas-Fort Worth)

    Published

    NBC 5 Dallas-Fort Worth's feed description

    The Oklahoma State Capitol, which houses the Oklahoma Legislature and executive branch offices, on June 8, 2026, in Oklahoma City.

Identical headlines usually mean shared wire copy. They are counted as separate articles but are not independent confirmation.

Letters with ‘suspicious' substance sent to congressional and election offices nationwide | Since Then