Grijalva spokesperson Adam Sarvana told TPM the Tucson office received two phone calls from the same man "threatening to come into the office and blow everyone's brains out." The caller said that afterwards, he would "go down to the border and shoot any Mexicans he saw."
The offices were closing at noon, once pressing business was finished, and is so far expected to reopen Monday. "People felt safe, but kind of shaken," Sarvana said.
Sarvana said police are currently stationed at both offices.
Arizona Gov. Jan Brewer has until tomorrow to sign the controversial bill, but reports indicate she may do so today. President Obama spoke out against the bill this morning, at a White House naturalization ceremony for members of the armed services.