Port St. Lucie police responded around 3:30 a.m. Sunday to the 1300 block of Southeast Rivergreen Circle after receiving multiple 911 calls reporting gunshots.

When officers arrived, they found two adult men suffering from multiple gunshot wounds in the driveways of a residence. Both victims were taken to separate local hospitals, where they later died from their injuries. Police identified the victims as Carl Loubeau, 24, and Juliun Stokes, 22.

Preliminary investigators believe some of the people involved had been socializing earlier in the evening before returning to a home on Southeast Rivergreen Circle. Police said a verbal altercation occurred outside the residence over a residential key and escalated into an exchange of gunfire between two of the individuals involved. The investigation remains active as detectives continue conducting interviews, processing evidence and reviewing available information. Police said additional details, including any potential criminal charges, will be released as the investigation progresses.

Neighbor John Adams told WPTV reporter Zitlali Solache he was awake working in his garage when the shooting occurred. "I was just working on my bicycle and I heard gunshots. Maybe two, three and I stayed in the garage and then I heard a girl screaming," Adams said.

He described a massive emergency response to the scene. "Every police officer in Port St. Lucie was here, there was twenty squads, two ambulances, two firetrucks, a helicopter.

It was just mayhem," Adams said. He added that a police officer told him they took a picture of 16 casings. "Just devastating, terrible.

My heart goes out to them," Adams said. Another neighbor who did not want to be identified told WPTV she dialed 911 and stayed with one of the wounded men until help arrived.

Investigators believe the shooting was an isolated incident involving people who knew one another and said there is no ongoing threat to the public. All parties involved have either been detained or are cooperating with investigators, according to police. Anyone with information who has not yet spoken with detectives is asked to contact the Port St. Lucie Police Department.