(New Madison, OH)--A New Madison convenience store was robbed at gunpoint late Monday night.  At around 10 o’clock, a man wearing a black ski mask entered the New Madison Mini Mart and showed a handgun to two clerks who were working inside.  The man then fled with an undetermined amount of cash.  Clerks could not determine if there was a getaway vehicle.  The robber is described as a white male, about 5-8, and about 150 pounds.  The clerks were not hurt.