Fighting

[Zoochy]

I was watching a local High School game on YouTube
B1 commits a common foul against A1. After a moment delay, A1 turns and swings at B1. B2 then comes running into the situation and chest bumps A1. B3 enters and shoves A1. Now A6 & A7 come running, off the bench, onto the court. A6 wants to enter the melee. An official grabs his arm and is trying to pull him away. A6 is swinging and flaying his arms trying to get away from the official and join the shoving/fight. Finally a Coach from Team A separates A6 from the official. The Coaches from Team B keep all of their remaining players at the bench.
It appears B1, B2 and B3 were disqualified. From the audio I believe A1 was disqualified and (per rule) A6 & A7 are disqualified. I can see the 3 Team B players exit the gym.
I am not sharp on the fighting rules. How should the game proceed from this point? What kind of fouls do we have and who shoots free throws?