Rounds’ Sioux Falls Office Evacuated After Letter Raises Suspicion

Sioux Falls, SD, October 16, 2026 —

The Sioux Falls office of U.S. Senator Mike Rounds was evacuated after receiving a letter suspected to contain a suspicious substance, according to the information provided.

The available account does not identify when the letter arrived or provide details about the substance that prompted concern. It also does not say whether the substance was tested, whether anyone was exposed or injured, or how long the evacuation lasted. No information was provided about who sent the letter or what it contained.

The evacuation is the only response described in the account. It does not specify whether emergency services or law enforcement attended the office, whether the building was searched, or whether the office later reopened. The account also does not state whether the letter was ultimately determined to be hazardous.

Because the substance is described only as suspected, its nature remains unconfirmed in the information available. No further details were provided about the status of the office or any subsequent investigation.

The incident involved the Sioux Falls office of Rounds, a U.S. senator. The account does not provide additional information about the office’s operations or whether staff members were present when the letter was received. Further details about the timing, safety assessment and outcome were not included.

Story summarized from the original created by Grant Sweeter,Michael Doorn on www.keloland.com, see more information here.

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