JACKSONVILLE, Fla. — A woman was fatally shot at a party on Jacksonville’s Westside early Saturday, according to the Jacksonville Sheriff’s Office as reported by First Coast News.

JSO Sgt. Highfill said at approximately 1 a.m. Saturday, officers responded to the 5800 block of Rover Drive in reference to the shooting.

Upon arrival, officers discovered a woman with a gunshot wound to her “upper chest,” stated Highfill. The Jacksonville Fire and Rescue Department arrived soon after and declared the woman deceased, Highfill added.

Highfill said the woman was about 20 years old, and said a witness reported that three to four gunshots were fired.

“Currently, we know that a party was taking place with several attendees,” Highfill explained. “A physical altercation erupted during the event, leading to gunfire.”

Highfill said officers detained five people and that they would be interviewed.

“We’re trying to determine the relationships of the people that were here, and involved, and present during the incident,” Highfill said.

When asked if those detained are considered people of interest or witnesses, Highfill told First Coast News at 6 a.m. Saturday: “At this point, I can’t speak to that. I don’t know the involvement of the people that we have detained.”

Anyone with information on the incident is asked to call JSO’s non-emergency number at 904-630-0500. To provide information anonymously, contact Crime Stoppers at 1-866-845-TIPS.