Spectator interference

[shipwreck]

In a NFHS game last weekend we had this play. Shortstop overthrows first base. The ball goes to the fence and is laying there. While the first baseman is going to retrieve the ball, a fan on the outside kicks the fence and sends the ball about 8 feet back towards the field of play. We called dead ball and awarded the runner a base. My question is, if you always award the offensive team for an act like this, what would happen if a fan's team WAS the offensive team, would you still award the base since his act benefitted his team? I don't see where it specifies in the rules that there is a difference in which team's fan did this. Thanks, Dave