Skeptic Project

(CNN) -- The FBI is investigating a toxic substance found inside a package that was sent to the office of Arizona Rep. Raul Grijalva, a spokesman for the congressman said.

Staffers checking mail in the congressman's Tucson, Arizona, office Thursday found a white powdery substance and drawings of two swastikas inside an envelope, Grijalva campaign spokesman Adam Sarvana told CNN.

The Tucson Fire Department confirmed the substance inside the envelope was toxic, he said.

Almost a dozen people were inside the office at the time, he said. All of them were checked on-scene by local authorities and sent home.

Scientists at an FBI laboratory in Phoenix, Arizona, are now conducting a full analysis of the substance, Sarvana said.

The incident was reported at 12:30 p.m. Thursday (3:30 p.m. ET), he said.

It marks the third security issue at Grijalva's district offices this year, Sarvana said.

"It's just a continuation of a problem we've been having," Grijalva told CNN affiliate KVOA.

In April, the congressman closed two local offices for an afternoon after receiving threats regarding his position on controversial immigration legislation. And in July, a bullet shattered a window in his Yuma, Arizona, office, KVOA reported.

"I do feel a great deal of concern for the people that work with me, for me. I feel concerned for the constituents that come to that office," Grijalva told KVOA Thursday. "Obviously, we're going to have to make more changes."

http://www.cnn.com/2010/CRIME/10/22/arizona.congressman.toxic.package/index.html