Who's throw in?

[Danvrapp]

Had this one last night. The more I think about it, the more I think I kicked it.

Last seconds of the 3rd. A1 shoots, releases (ball in flight), A2 fouls B1 (push on box out). Horn goes off, ball does not go in. Neither team in bonus. Arrow favors A for start of 4th.

The horn may or may not have went off before I blew the Fox, but it was close.

Teams go to their respective bench, I report foul, and we start 4th with team B having division line throw in. Coach A didn't like it, but I told him his guy fouled and B gets the ball to start the 4th. Either way, I figure, team B should be entitled to the throw in, but I wasn't sure if the foul should be considered part of the 3rd???

Closest case book I can find is 5.6.3B, but my sitch wasn't a T, just a common foul.

Did I kick it?