The office of Rep. Raul Grijalva (D-Ariz.) has been locked down due to the presence of a suspicious package covered with swastikas, according to reports. KVOA reports that an "envelope containing white powder" was mailed to Grijalva's Tucson office. Bomb technicians are reportedly on hand.

Grijalva told KVOA that the substance is toxic and Keith Olbermann tweeted that the Congressman would confirm that durring an appearance on "Countdown."

According to the Arizona Daily Star, the envelope was decorated with multiple swastikas and included a "white powdery substance" inside. No one at the office has been injured, Politico reports, which also claims that the FBI is now involved in the investigation.

Grijalva has served in the House since 2003. He was reelected in 2008 with 63% of the vote.

More to come..