( CNN ) -- Authorities in Utah evacuated a passenger plane Thursday morning after receiving a bomb threat , a spokeswoman for the Salt Lake City International Airport said . The SkyWest plane , carrying 46 passengers and three crew members , was en route to Salt Lake City from Helena , Montana , when the threat was `` called in , '' said airport spokeswoman Barbara Gann . The Transportation Security Administration `` is aware of an anonymous call reportedly threatening SkyWest Airline Flight 4654 , '' said spokesman Nicholas Kimball . `` The plane landed safely without incident . Out of an abundance of caution , law enforcement swept the aircraft with negative findings . '' All passengers and luggage were screened and released , and the plane was to be put back into service , said Debbie Bertram of the FBI 's Salt Lake City office . The call `` was a threatening call that said that there may be the potential of an incendiary device onboard this aircraft -- so that just unrolled the protocol for a bomb threat , '' Gann said . CNN 's Jeanne Meserve contributed to this report .
NEW : The passengers and luggage were screened and released . TSA says nothing was found on the aircraft .