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Authorities in California have reopened a post office in downtown San Jose after an evacuation was prompted by concerns about a white powder discovered in a package.

San Jose Fire Capt. Mary Gutierrez says the powder turned out to be a harmless herbal tea remedy from Taiwan that a man had ordered for his child.

Fire officials say two employees had complained of sore throats and headaches after being exposed to the powder around 8 a.m. Tuesday. Gutierrez says some of the powder was leaking from the package, and the workers may have inhaled it.

Those two, as well as a third employee in the area, were decontaminated by a hazardous materials unit as authorities investigated the scene.

The post office reopened by 10:30 a.m.