Throw in problem

[ajloud]

Here's the sitch- Start of 3rd qtr, arrow pointing to A. I am at lead under A basket, partner at div line handling throw in. I hear whistle toot and here comes B with the ball completing a layup while A stands there. A1 picks up ball and I stop play. A check with partner confirms he gave ball to B at throw in. Is this Correctable by NF rule? We went to coaches and started play over in the blowout game, but I want to know correct procedure according to rule.