Fight rule

[ref83]

Player A1 fights players B1 and B2. Result, A1, B1 and B2 are assessed flagrant technicals. Thus, team A will shoot 2 free-throws. At approximately the same time the fight breaks out on the court as described above, bench personal A6 and A7 enter court but do not participate. Bench personal B6 enters court but does not participate. Result, A6, A7, and B6 are assessed flagrant technicals and coaches are each assessed one indirect technical. Thus, team B will shoot 2 free-throws. Is this situation treated as a double technical? Do the free-throws cancel each other out or would team A shoot 2 and team B shoot 2? What is the rule or case book play that covers this situation?