NASHVILLE, Tenn. (AP) — Detectives pursued active leads Sunday as they investigated a shooting that left two dead and two wounded after a birthday party dispute in a neighborhood in Nashville, Tennessee, police said.

An exchange of gunfire took place Saturday night at an apartment complex in the Antioch neighborhood, the Nashville Metro Police Department said.

The shooting stemmed from a dispute at a birthday party at a swimming pool in the complex, police said. People began running and shooting after the first shot was fired, police said.

Demontae Darden, 18, died in the parking lot, police said. Kalem Buford, 20, was dropped off by private vehicle at a hospital, police said. He also died.

Two other people suffered wounds that were not considered life threatening, police said. One was a 31-year-old apartment resident who was shot in the leg “when he mistook the gunfire for fireworks and came outside to ask that it stop.” a police statement said.

Detectives asked the public to contact the police department with information about the shooting.