The man was apparently attempting to rob the Chase Bank and he was shot by a security guard in the lobby, police said.
Around 10:30 a.m., a security guard noticed a man walking into the bank wearing a trench coat and walking in a "stilted manner."
The man entered the bank lobby and produced a long gun from under his coat.
The two security guards on staff ordered the man to drop the weapon and drew their weapons on the gunman, police said.
When the gunman aimed at a security officer, the officer shot and killed him.
Police are on the scene and the investigation is ongoing.
This is the second bank robbery suspect shot by a security officer this week and the tenth person killed this year by private security officers who have been involved in more than 200 armed confrontations this year according to Private Officer International.