Au Bon Pain robbery attempt

It is never good news when you see three people running through an alley way stripping off an outer layer of clothes. That's what I would think anyway if I were the security guard who witnessed Au Bon Pain robbers flee the scene.
Three men stormed through the back door as the shop was closing and employees were trying to leave for the night. One man had a knife. The employees were tied up, and the manager was told to open the safe. The manager got so nervous he forgot the combination and asked to sit down. He then bolted out the front door. Suspects had no idea what to do at that point so they also left, but through the back door. A security guard in Harvard Square saw these three men running and was able to give the police vague descriptions.

The suspects are described as one white man in his 20s with a medium build and two black males in their early 20s and taller than six feet. One black man is described as heavy set, while the other man has a medium build.

No one is safe anymore. I feel as if Harvard has become particularly scary.