Phoenix, Arizona – An IRS agent was gunned down by one of his own Thursday evening during a training exercise according to ABC 15 News.

ABC 15 News also revealed that the FBI is "investigating" the shooting which is being called an accident.

Charlotte M. Dennis with the Phoenix Field Office of the IRS Criminal Investigation (CI) division told Arizona's Family that it was aware of an "incident" involving one of its special agents.

She said the agent was taken to HonorHealth Deer Valley Medical Center, where he later passed away.