UNCLE SAM IS WARNING SOME OF ITS UTAH WORKERS TO BE ON ALERT, AFTER TWO MEN THREATENED A B-L-M WRANGLER, ON INTERSTATE 15, ABOUT 90 MILES SOUTH OF SALT LAKE.

THE FEDS SAY THE INCIDENT OCCURRED NEAR NEPHI, WHEN THE MEN -- WEARING HOODIES -- PULLED UP ALONGSIDE A MARKED B-L-M TRUCK, AND HELD UP A SIGN THAT READ, "YOU NEED TO DIE."

THE WORKER SAYS, ONE OF THE SUSPECTS ALSO HELD A HANDGUN.

THE WRANGLER SLOWED DOWN, AND LET THE DARK BLUE TRUCK PASS.

HE ALSO CLAIMS THE SUSPECT VEHICLE'S LICENSE PLATE NUMBER WAS COVERED WITH DUCT TAPE.