In northern Mississippi, a man armed with a shotgun and two handguns went on a killing spree Friday, fatally shooting his ex-wife, stepfather, stepsister and three other people, before police finally arrested him. The massacre came in a small town south of Memphis, Tennessee, where on Sunday one person was killed and 10 others were wounded by gunfire at a nightclub and a nearby residence.

Meanwhile, police in Columbus, Georgia, responded to calls of a shooting at a gas station on Friday, where they found nine children injured with gunshot wounds. And in Linden, New Jersey, four family members are dead in an apparent murder-suicide. Investigators believe the father fired on his wife and two teenage children on Sunday before turning the gun on himself. According to the Gun Violence Archive, there have been 80 mass shootings in the United States since January 1.