A shooter at a bank in downtown Louisville killed at least four people — including two friends of the governor — and wounded at least nine others Monday, authorities said. The suspect also was dead. The shooting, the 15th mass killing in the country this year, comes just two weeks after a former student killed three children and three adults at a Christian elementary school in Nashville, Tennessee, about 160 miles (260 kilometers) to the south. That state's governor and his wife also had friends killed in that shooting. Police in Louisville arrived as gunshots were still being fired inside Old National Bank and exchanged fire with the shooter, Louisville Metro Police Department Deputy Chief Paul Humphrey said at a news conference. He said it wasn't clear whether the shooter killed himself or was shot by officers. More: https://www.wtsp.com/article/news/nation-world/downtown-louisville-kentucky-bank-shooting/507-ba704e68-9b34-4ae2-9a27-dc5ec89c0fd1