An unknown white powder at former Congresswoman Katie Hill’s Palmdale office prompted an evacuation Monday, officials said.

The incident was reported at about 12 p.m. Monday near the 1000 block of West Avenue M 14 in Palmdale, according to Supervisor Sims with the Los Angeles County Fire Department.

“This was at a government building, it was called in by Sheriff’s,” Sims said. “A powder was found in an envelope.”

LA County Fire Health Hazardous Materials units were dispatched to the scene, according to Sims.

Upon arrival, health hazmat units requested the occupants of the building to evacuate while officials determined what type of substance was in the envelope, according to Fire officials.

“Units requested all personnel to be outside the building as a precaution,” Sims said.

Two ambulances were requested to the scene, according to Fire officials.

The substance was deemed non-hazardous, but it is still unknown the type of powder, Fire officials said.

The incident is under investigation, and no arrests have been made as of Monday afternoon.

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