Two United States Postal Service workers were killed at a shooting in Memphis Facility, according to the Police. 

Authorities said that the suspected shooter was also their co-worker at USPS, who appears to have been dead after a self-inflicted wound. 

The incident happened Tuesday afternoon inside the East Lamar Carrier Annex, which has no retail customers. The Memphis Police Department said at about 2:50 p.m. local time that the site had been secured and that there was no active threat.

A witness told Memphis ABC station WATN that she saw people fleeing after hearing guns fired.

Postal Inspector Susan Link informed reporters that the USPS is collaborating with the FBI, Memphis Police Department, and the Bureau of Alcohol, Tobacco, Firearms, and Explosives on the investigation.

The USPS and FBI did not provide any further information on the incident, including the identities of the victims or the suspect.

"The Postal Service is saddened at the events that took place today in Memphis," the USPS said in a statement. "Our thoughts are with the family members, friends, and coworkers of the individuals involved. The Postal Service will be providing resources to all employees at the East Lamar Carrier Annex in the coming days and weeks."

This is the second high-profile workplace shooting in Memphis in the last several weeks. A shooting at a Kroger grocery store in Collierville last month killed one person and wounded 14 others. According to authorities, the accused gunman, a third-party vendor for Kroger, also had died of an apparent self-inflicted gunshot wound.