An envelope with white powder caused an evacuation at former Rep. Katie Hill Katherine (Katie) Lauren HillObama counsels NBA players on forming a social justice committee Republicans cast Trump as best choice for women House GOP campaign chairman insists party will win back majority MORE’s (D) California office Monday.

Hazardous materials crews and the Los Angeles County Fire Department responded to the office formerly belonging to Hill in Palmdale shortly after noon, ABC’s local affiliate KABC reported.

Two people had minor injuries from the incident, a spokesperson for the fire department told The Hill on Tuesday.

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Those exposed will be decontaminated and brought to a medical facility, the television station reported. Office employees who opened the envelope became itchy a couple of hours later, according to Fox’s local affiliate Fox 11.

The powder was tested and determined to be non-hazardous, Fox 11 reported. The investigation is ongoing, and there have been no arrests.

A spokesperson for the FBI's Los Angeles field office told The Hill they are investigating the incident and there are no known current threats to public safety.

Hill resigned from her congressional position last week after reports surfaced that she had an alleged inappropriate relations with congressional and campaign staffers and nude photos of her were published. Her last day in Congress was last Friday.

Updated: Nov. 5 at 5:01 p.m.