A courier had just left a jewelry store in the Provo Towne Centre Mall and was walking through the parking lot when the suspects pulled up in a minivan.
One of the suspects pulled a knife and demanded jewelry.
After they got the jewelry, the suspects slashed the tires of a car the victim was standing by. Police say they thought that was the victim's car, but it was not.
The suspects were all wearing black hooded sweatshirts with red cloths over their faces. They were driving a 2004-2007 grey Honda Odyssey.
Anyone with information is being asked to call detective Payne at 801-852-7280.