U.S. Democratic Rep. Raúl Grijalva is closing his Tucson and Yuma offices today at noon because of what he said were multiple death threats and threats of violence.

Police are stationed outside his Tucson office, according to a statement from spokesman Adam Sarvana.

Sarvana said the office received “some pretty scary calls,” including two from the same person, he said, “who threatened to go down there and blow everyone’s brains out then go to the border to shoot Mexicans.”

Grijalva staffer Ruben Reyes said the office has been flooded with calls all week about Senate Bill 1070. About 25 percent are "very racist" in nature, Reyes said, characterizing some as "telling that tortilla-eating wetback to go back to Mexico."

He said the staff feels "very intimidated" by the calls from this morning.

Grijalva has been calling for a statewide boycott of conventions to pressure Gov. Jan Brewer into vetoing a controversial immigration bill that authorizes local law enforcement to check immigration status given reasonable suspicion.

Sarvana said since conventions or conferences "bring in a large amount of people and money at one time, he feels they’re an appropriate target."

"As he’s said, he doesn’t want to carry this ban out any longer than necessary. The message needs to be heard, and he wants to do it quickly and clearly. He’s not interested in undermining the economy – this is about sending a message, not bankrupting the state."