Police, sheriffs, judge receive white powder

December 8, 2009 4:53:16 PM PST
The Hayward Police Department headquarters, that Alameda County Sheriff's Department in Oakland and a superior court judge in Hayward all received envelopes filled with white powder Tuesday.

That Hayward Police Department was evacuated for three hours while hazmat teams checked the powder.

All of the powder turned out to be harmless, but the incidents are still being investigated. Investigators say they do not know whether it was a prank or something more serious.