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SALT LAKE CITY (AP) — Authorities say the federal courthouse in Salt Lake City was locked down for about 90 minutes after employees in the building reported hearing a possible gunshot.
U.S. Marshal James Thompson says investigators found no evidence of shots fired or weapons in two searches of the building Friday and it was re-opened about 2 p.m.
Thompson says it isn't clear what caused the sound described as a loud, muffled bang.
He said all traffic in and out of the building was briefly stopped as a precaution during the search.
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