Penalty Administration Question

[Nevadaref]

This came up in another thread, but I wanted to give it one of its own in order to get clearer feedback from everyone.

On the following play what calls do you make, how many FTs are awarded (shot), and how is the game resumed?

A1 and B1 create a held ball in the FT lane. These two players become entangled and are a bit upset with each other. After the whistle sounds and the players rise to their feet, A1 shoves B1 in the chest in an unsporting manner. B1 is pushed back about five feet and does nothing in response. As the officials close in and step between the two players, B6 leaves the team bench area, runs onto the floor, and punches A1 in the face. Since the officials are already right there, they are able to control the situation without anything else happening.