Toxic substance forces closure of Grijalva office

Police locked down the Tucson congressional office of Rep. Raul Grijalva (D-Ariz.) on Thursday afternoon after staffers received a package containing a "confirmed" toxic substance, a Grijalva spokesman said.

A suspicious package with swastikas written on the envelope was mailed Thursday to the Tucson office, where about a dozen staffers work. Upon inspection, it was found the package contained a white powder authorities later determined to be toxic, said Grijalva campaign spokesman Adam Sarvana.