DENVER -- Police are looking for a robber who grabbed a clerk through a drive-through window, held a knife to his neck and stole cash out of the register.

Police said the robbery happened Friday night at the Good Times restaurant in Northglenn, reported the Denver Post.

The robber -- said to be between 16 and 20 -- was wearing a gray hoodie, black gloves and a red bandanna over his face, police said.

The employee was not hurt.

Police said the robber came up to the window on foot, reached inside, grabbed the clerk by the apron and demanded he open the register.