The robbery took place around 2 a.m., Tuesday, May 28, at the Dunkin' at 593 Post Road, said Fairfield Police Lt. John Bucherati.
The cashier told officers that a black male, with a thin build, in his 40’s, wearing a red jacket and hat came into the store and threatened to shoot her, Bucherati said.
"The male implied that he had a gun, however, no firearm was displayed," he added.
The suspect took an undetermined amount of cash from the register and fled the store, police said.
A K9 track of the suspect was unsuccessful.
No one was injured during this incident.
Fairfield Detectives are actively investigating this incident and ask anyone with information to contact the detective bureau at 203-254-4840.
Click here to follow Daily Voice Fairfield and receive free news updates.