JONESBORO, Ark. — Three people were killed and several others injured early Sunday when a shooting broke out at a private party in Arkansas, police said.Officers found multiple gunshot victims when they arrived at the scene near Jonesboro’s downtown area around 5 a.m. Sunday, Jonesboro police said in a Facebook post.A man and woman, who police said were acquaintances of the shooter, were killed, police said. The shooter also died. Another woman, who was also an acquaintance of the shooter,…