SHREVEPORT, La. — Police in northwest Louisiana said an officer died after being shot while on duty, and a manhunt for a suspect was under way.

Shreveport police spokesman Bill Goodin told The Associated Press that investigators believe they know who the suspect is and are obtaining a warrant for his arrest.

Goodin said a news conference was to be held this morning to outline details of the deadly shooting and release the name of the dead officer.

Cpl. Marcus Hines said late Wednesday that the officer was shot while responding to a report of a suspicious person inside a home. Hines said an armed man was apparently inside the home, threatening to harm people.

Goodin said Shreveport police, Caddo Parish deputies, along with DeSoto Parish deputies and the state police were searching for the shooter.