Several law enforcement officials told NBC News that the man shot and killed in the shootout with Baton Rouge police was identified as Gavin Long, of Kansas City, Missouri, born 1987.
Three Louisiana officers have died and three others were injured early Sunday after what the city's mayor called an apparent ambush shooting.
Authorities confirmed the names of the three officers fatally shot: Montrell Jackson, 32, Matthew Gerald, 41 — both of the Baton Rouge Police Department, and Brad Garafola, 45, of the East Baton Rouge Sheriff's Office.
Two other officers from East Baton Rouge were injured. Nicholas Tullier, 41, is in critical condition and Brad Simmons, 51, sustained non-life threatening injuries.
Law enforcement officials initially said they believed that two others suspects were at large, but at a news conference Sunday afternoon State Police Col. Mike Edmonson said the deceased suspect was likely the only shooter.
A senior law enforcement official said that suspect wore black fatigues and was armed with a rifle. By 3 p.m. (CT) Sunday, state police said there was "no active shooter" situation.
Officials tell NBC News the investigation now spans four states: Louisiana, Texas, Missouri and California. It is being led by the Louisiana State Police.
The attack comes less than two weeks after the fatal shooting of a black man by police sparked protests in Baton Rouge, turning the city into the latest flashpoint in the ongoing debate over law enforcement tactics.
This is a developing story. Check back for updates.