5:55 p.m. The substance found in Midwest City has been determined as medical grade starch and is not hazardous, a Midwest City fire official said.
The homeowner in the 1000 block of Moraine Avenue in Midwest City told 911 that he received an envelope with a substance in it.
The fire official said police will determine if the substance was sent maliciously.
5 p.m. Police and fire crews have responded to a report of a white, powdery substance in an envelope in Midwest City.
A Midwest City police dispatcher said a man called to report he received an envelope with a substance in it. The dispatcher did not say where the call came from.
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