Salt Lake City ? FBI agents on Sunday searched a Utah house and two storage units linked to a man whose hospitalization led to the discovery of deadly ricin in a motel room he had occupied on the Las Vegas Strip.

The search of the home and units at a self-storage facility outside Salt Lake City was expected to be a long, tedious process as agents operated carefully at sites where they could find the dangerous substance, FBI spokesman Juan Becerra said.

No results of the ongoing searches were announced at a press conference late Sunday morning, but FBI Special Agent Timothy Fuhrman said “There is no indication of any terrorist act or activity.”

Roger Von Bergendorff, 57, the focus of the investigation, had lived in the Riverton house for more than a year before moving to Las Vegas about a year ago, said Tammy Ewell, who lives across the street.

He lived there with his cousin Thomas Tholen and his wife, said Ewell, who described the couple as close friends.

In a brief telephone interview, Thomas Tholen told The Associated Press that Von Bergerdorff was “holding his own” in the hospital.