The officer who was killed was assigned to NOPD's 7th District, which polices New Orleans East, Harrison said.
State Police and ATF were also on the scene early Friday morning.
The New Orleans Force Investigation Team will investigate the officer-involved shooting, according to department protocol, Harrison said. New Orleans SWAT surrounded the building and were able to get the suspect to peacefully surrender, Harrison said. He is in a local hospital, and will be charged once he is released.
"Unfortunately, our worst nightmares have come to be", Landrieu said.