New Delhi, June 2 -- A deadly weekend of gun violence across three U.S. states left at least three people dead and over 15 injured. In Danville, Virginia, a gunfight at an outdoor gathering killed one and wounded four. In Baldwin Park, California, a police officer was fatally shot in an ambush, while another officer and a civilian were wounded. Meanwhile, in Hickory, North Carolina, a house party turned violent as more than 80 shots were fired, killing one and injuring 11. Investigations are underway in all three incidents.

At least five people were shot early Sunday during a gunfight between two groups at a large outdoor gathering in Danville, Virginia, police said.

The incident occurred around 1:30 a.m. on private property near the No...