WASHINGTON, Oct. 16 -- Sen. Mike Rounds issued the following press release:

SIOUX FALLS - U.S. Senator Mike Rounds (R-S.D.) issued the following statement after a letter believed to contain a suspicious substance was received in his Sioux Falls office:

"Today, my Sioux Falls office received a suspicious piece of mail," said Rounds. "My team members followed proper protocols advised by U.S. Capitol Police and contacted the Sioux Falls Police Department, who responded immediately to investigate and evacuate the office.

"I am grateful for the U.S. Capitol Police, who intercepted other letters and sent out a warning allowing my team to recognize this letter before opening it, and to the Sioux Falls Police Department. I am also grateful for a...