Police said they believe the suspect acted alone.
Shreveport Police Chief Wayne Smith said his heart went out to the entire community.
“I just cannot begin to imagine how such an event can occur,” Smith said.
He added that the investigation is being conducted in coordination with the Louisiana State Police and with assistance from other agencies.
“We are going to be working diligently however long it takes to get some answers to what has taken place,” he said.
Speaking on Sunday, Shreveport councilman Grayson Boucher said more than 30% of crimes and 30% of murders in the city were “domestic in relation”, adding: “Now that number has gone up.”
“We’ve more than doubled our homicide in the city of Shreveport because of one act of domestic violence,” he said.
Louisiana Governor Jeff Landry said he and his wife were “heartbroken over this horrific situation, and we’re praying for everyone affected”.
“We’re deeply grateful to the law enforcement officers and first responders working tirelessly on the scene,” Landry added.
House Speaker Mike Johnson, who represents Louisiana’s Fourth District, has also commented on the “heartbreaking tragedy”.
“We’re holding the victims, their families and loved ones, and our Shreveport community close in our thoughts and prayers during this incredibly difficult time,” he said, adding that he was grateful for the quick response of local police.
