(Miami-Dade County, FL) -- 

The Miami-Dade Police Department, Robbery Bureau is investigating an armed robbery in which the subjects shot at a witness thinking he was the police.  Investigators say that two subjects entered the store wearing hooded sweaters and armed with handguns, held an employee at gunpoint and demanded money from the register.  They then ripped two registers from the counter and attempted to run out the front doors.  As they fled, one of the subjects observed someone standing outside and yelled to the other subject, "It's the police, shoot him, shoot him." They fired several shots at the individual who returned fire with his own firearm.  The subjects then fled through the back doors of the business.  No one was injured.