Two U.S. Postal Service employees were killed Tuesday and another, who was identified as the suspected shooter, died from a self-inflicted gunshot, the FBI said.

The shooting occurred at the Orange Mound post office, and the Memphis Police Department was assisting with securing the perimeter, the police force tweeted. The U.S. Postal Inspection Service, the law enforcement arm of the Postal Service, told Fox News the shooting occurred at the facility called the East Lamar Carrier Annex.

"We are working jointly with the Memphis Police Department, the Federal Bureau of Investigation and the Bureau of Alcohol, Tobacco and Firearms," the agency said. 

The FBI said the suspected shooter died from a self-inflicted gunshot. The police department said there were no active threats and the area was secured.