ALL CLEAR: Letter with white powder found at federal building

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

OKLAHOMA CITY - HazMat has given the "all clear" after a letter was found with white powder at the federal building downtown Monday.

Officials have not confirmed who may have sent this letter.

They said a worker opened a package in the mail room and found a letter inside containing the white powder.

Last week three letters were found at Oklahoma government buildings all with a white powder inside.

Authorities determined an inmate sent those letters and the substances were not a threat.

Notice: you are using an outdated browser. Microsoft does not recommend using IE as your default browser. Some features on this website, like video and images, might not work properly. For the best experience, please upgrade your browser.