John McCain Campaign Office Evacuated

John McCain's staff in Denver has been evacuated. The campaign office received an envelope containing a threatening letter and some white powder. Several people from the staff have checked into a local hospital.

On Thursday afternoon, a letter arrived in the mail addressed to John McCain's campaign office in Centennial, Colorado. Centennial is a Denver suburb.

Local and federal law enforcement authorities were immediately contacted after white powder was found in the envelope.

A spokesman for the campaign said the letter was threatening, and they were taking all necessary precautions.

John McCain was at his home in Sedona, Arizona.

Nearly, 10 people who were in the office went to a nearby hospital.

The envelope was opened by a campaign staffer. An FBI hazardous materials team is currently on the scene, along with Secret Service personnel and local authorities.