According to folks that were there, a scuffle broke out between the Raider Klan and A$AP Mob, which lead to Purrp being placed in handcuffs.
According to Complex, 30 members of the Klan were involved, while only two members of the Mob, A$AP Bari and A$AP Nast, (really with these names?!) tangled with SGP and them. No one was seriously injured.
UPDATE: Video footage of the brawl surfaced online today. Check it out below.