UPDATE: Powder in package at U.S. attorney’s office not anthrax

OKLAHOMA CITY – Officials have confirmed the suspicious package found with a white powdery substance at the U.S. Attorney’s Office downtown did not contain anthrax.

Thursday afternoon Hazardous materials, the FBI and the Secret Service investigated the reported threat in the Oklahoma Tower near Main St. and Hudson.

They asked workers to stay in their offices during the investigation.

Authorities are now working to confirm who sent the package.