At least 11 people, including a teenager, were killed in a spate of weekend shootings from Florida to Massachusetts.

Three people were killed and 15 others were injured in gunfire at a party attended by an estimated 1,000 people in Stockton, Alabama, on Saturday night, Baldwin County Sheriff’s Capt. Andre Reid said in a statement.

Investigators believe there were multiple shooters as violence broke out about 9:30 p.m. on an open field used as an outdoor venue, he said.

No arrests have been made.

Two people were dead following a shooting at an Atlanta nightclub early Sunday. Officers responded to the Elleven45 Lounge at 2110 Peachtree Rd. NW at around 2:28 a.m. and found six people who had been shot, Atlanta police said.

Two of them were pronounced dead at the scene, and two others were taken to a nearby hospital and are expected to survive. The conditions of the other victims were not immediately known.

“Preliminary investigation indicates the shooting occurred during a physical dispute at the location that escalated to gunfire,” the police department said in a news release.