Both were found dead inside by a SWAT team shortly after the first shot was fired.
Before the gunman was confirmed dead, tactical police were seen entering the building carrying weapons.
Workers claimed the man was a disgruntled former employee who was fired a few days ago. Police found the gunman inside.
Despite fears at the scene that multiple people had been shot, the NYPD said the two people were killed are the only victims.
More about: #Manhattan #shooting