HAYWARD, Calif. (AP) - Four police agencies in the San Francisco Bay area are investigating envelopes they received filled with an unknown white powder.
Authorities determined the powder sent to the Hayward, San Leandro and Berkeley police departments is not hazardous. The Bay Area News Group reports testing is ongoing at the Union City station.
Hayward Fire Capt. Thor Poulsen says a records clerk sorting through the station's mail first discovered white powder leaking from an envelope around 10 a.m. Friday. Employees on the first floor evacuated until the Alameda County hazardous materials team determined the substance was nonlethal.
Then the other three police departments found similar envelopes. In the case of San Leandro, authorities later determined it was baking flour.
No suspect has been named in the incidents.
Copyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.