Atlanta Police are investigating what's being called a crime of opportunity.

Around 11:30 Monday night, an armed man wearing a ski mask and a hoodie robbed Willy's Mexicana Grill in Buckhead.  The suspect, who was apparently waiting outside the rear of the West Paces Ferry Road restaurant, was able to gain entry when an employee opened the back door to take out the trash.

Once inside, the suspect forced the night manager to give him money from the safe.  The two employees who were inside the closed business were not hurt.  Because his face was covered, investigators have not determined the suspect's race.

WSB's Jon Lewis reports from the scene, police hope surveillance video from the restaurant will lead to an arrest.