SOUTHAVEN, Miss. (AP) — A gunman described as a disgruntled Walmart employee fatally shot two co-workers and wounded a police officer before he was shot and arrested Tuesday morning at a Walmart store in northern Mississippi, authorities said.

DeSoto County District Attorney John Champion said 39-year-old Martez Tarrell Abram shot a Southaven police officer, who was protected by a bulletproof vest and suffered minor injuries. Southaven Police Chief Macon Moore said a second Southaven officer shot Abram, who underwent surgery at a hospital in neighboring Memphis, Tennessee.

Both the people kill...