Powder found inside envelopes mailed to the downtown Church Office Building Friday resulted in six people being evaluated by emergency crews.
But as of Friday afternoon, Salt Lake fire spokesman Jasen Asay said investigators believed the powder was "not a credible threat."
About 10 a.m., hazardous materials crews were called to the third floor of the office building of The Church of Jesus Christ of Latter-day Saints, 50 E. North Temple.
"It's where the missionary department is," Asay said.