( Fox )
The Sacramento Police Department made the first arrest on Monday related to a mass shooting in the early hours of Sunday morning that left six people dead and 12 others wounded.
Dandrae Martin, 26, was arrested on Monday morning and is facing charges of assault with a deadly weapon and unlawful possession of a firearm by a felon.
Sacramento District Attorney Anne Marie Schubert said her office is reviewing evidence and could file additional charges.
"This individual has not been arrested for any homicide related to this incident," Schubert said in a statement. "The investigation is highly complex involving many witnesses, videos of numerous types and significant physical evidence. This is an ongoing investigation and we anticipate more arrests in this case."
Martin also has an active warrant out of Riverside County that was issued in 2015 for allegedly inflicting corporal injury on a spouse, according to court records.
The Sacramento Police Department SWAT team has served search warrants at three residences and recovered at least one handgun in the wake of the shooting. Sacramento Police Chief Kathy Lester said Sunday that a stolen handgun was also recovered at the scene.
Around 2:00 a.m. on Sunday morning, multiple shooters opened fired in downtown Sacramento as people flooded out of bars and restaurants.
"We know that a large fight took place just prior to the shooting and we have confirmed that there are multiple shooters," Lester said at a press conference.
Three men and three women were killed by gunfire, while a dozen others were wounded and are being treated at area hospitals.
The six deceased victims were identified on Monday as Johntaya Alexander, 21; Melinda Davis, 57; and Yamile Martinez-Andrade, 21; Sergio Harris, 38; Joshua Hoye-Lucchesi, 32; and Devazia Turner, 29.
Investigators recovered more than 100 shell casings at the scene, which spans multiple city blocks, and located at least three buildings and three vehicles that were hit by gunfire.
Members of the public have sent in dozens of videos and photo files, and police are encouraging people to submit anything that might can be used as evidence.
It was the second mass shooting this year in Sacramento after a man shot and killed his three daughters, a chaperone, and himself during a supervised visitation in a church in February.
The city also saw a 30% increase in homicides last year, according to police data.