A couple of teenage girls are facing charges after a store employee says two robbers threatened to stab him. Prince Albert Police say, just after midnight this morning (tues), patrol officers responded to a robbery in progress at a business on the 28 hundred block of 6th Avenue East. The employee says the girls pulled a knife and got away with some merchandise. Police cordoned off the area, and deployed the K9 Unit. A 17 year old girl and a 16 year old girl were found hiding in a yard on the 400 block of 28th Street East. Officers recovered a knife and property. Both girls are facing robbery charges. They are in court today.