Lopinto added that at this time it appears the suspect shot two victims inside the location then was engaged and shot outside the location by multiple other individuals.
Two more people were transported to a local hospital for treatment and were in stable condition, it said. The Associated Press reports that the first shooter, a customer at the gun store and range, fired the initial shots inside where he hit two people who were later pronounced dead.
A man walked into a gun range and outlet store with a loaded weapon unholstered and an altercation ensued, according to local media.
New Orleans Advocate reporter Ramon Vargas wrote on Twitter that he saw two screens used to shield bodies from view set up outside the Jefferson Gun Outlet and a handgun on the ground. Staff who work there often wear a sidearm.
"We're trying to put it all together, piece it together", Lopinto told AP.
None of the dead or wounded were immediately identified.
Lopinto said investigators are just beginning to piece together what happened.
Caution tape surrounded the business to keep onlookers from away from the crime scene where ambulances and numerous law enforcement vehicles had arrived earlier. A neighboring Taco Bell had been evacuated.
Jefferson Parish authorities were investigating a shooting that caused "multiple deaths" Saturday afternoon in Metairie, 15 minutes west of New Orleans, Fox 8 reported.