Dorm Safe After HAZMAT Investigation at Georgetown University

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    NEWSLETTERS

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    (Stock Image of Georgetown University)

    D.C. Police say a dorm on the campus of Georgetown University is safe after someone reported finding a powdery substance early Tuesday morning. 

    Authorities were called to McCarthy Hall in the 3700 block of O Street NW early Tuesday morning for the possibility of ricin in the building.

    A school spokeswoman says a test for "biological agents in the area were negative."

    Authorities will conduct additional tests on the material. School officials say a subject is being interviewed in connection with the incident. 

    Stay with NBCWashington on-air and online for more on this developing story.