Police in California have arrested a second suspect in the deadly shooting in downtown Sacramento early Sunday morning.

The new suspect — the brother of a man arrested Monday in connect with the incident — was himself seriously wounded in the shooting, the Sacramento Bee said.

Smiley Martin, 27, has been charged with possession of a machine gun and possession of a firearm by a prohibited person. His brother, 26-year-old Dandrae Martin, was booked Monday on charges of assault with a firearm and being a prohibited person in possession of a firearm, as CrimeOnline previously reported.

Neither of the brothers have been charged with homicide.

Six people were killed in the shooting that erupted in the streets outside a popular strip of nightclubs. Another 12 people were wounded.

Investigators identified the six slain victims as Johntaya Alexander, 21; Melinda Davis, 57; Yamile Martinez-Andrade, 21; Joshua Hoye-Lucchesi, 32; Sergio Harris, 38; and Harris’ cousin, Devazia Turner, 29.

Law enforcement sources confirmed to the Bee that Smiley Martin posted a 15-minute Facebook Live video several hours before the shooting. In the video, he appears to be carrying a semiautomatic handgun. The video has since been removed.

Investigators are still working to confirm whether a large fight that broke out in the streets as bars were letting out at 2 a.m. may have sparked the shooting.

They also said that the stolen handgun found on the scene “has now been inspected and found to have been converted to a weapon capable of automatic gunfire.”

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[Featured image: A memorial grows near the scene of the mass shooting in Sacramento, California. (AP Photo/Rich Pedroncelli)]