Last second three?

[surehands]

The score is tied. With 1 second ledft on the clock in he 4th quarter. A1 releases a jump shot from beyond the three point arc. After the release, but before A1 returns to the floor, B1 fouls A1. The foul is not intentional or flagrant. A1 's shot goes in the basket after the horn sounds. Ruling?
Count A1's three point basket;charge a foulto B1: and shoot no free throws???????