LAPD probe threatening letter to Craig Ferguson

FILE - In this March 21, 2010 file photo, talk show host and actor Craig Ferguson arrives at the premier of the feature film "How to Train Your Dragon" in Universal City, Calif. (AP Photo/Dan Steinberg, file)

August 23, 2011 8:00:18 PM PDT
Los Angeles police are investigating a threatening letter sent to Craig Ferguson which contained a white powder that turned out to be harmless.

Det. Gus Villanueva declined Tuesday to discuss the nature of the threat against the talk show host, saying only that it came in an envelope sent from overseas.

Two people at CBS Television City, where "The Late Late Show" is filmed, were temporarily held in isolation after being exposed to the powder around 3 p.m. They were released after a hazardous materials team screened the powder and found it to be benign.

FBI spokeswoman Laura Eimiller said the agency was working with police to find out who sent the letter.