Pass Interference Flag picked up on controversial last play on Monday Night Football

On the last play of the game on Monday Night Football, Tom Brady threw a prayer up to the end zone and it was picked off by Carolina Panthers DB Robert Lester.  At first Luke Kuechly was flagged for pass interference because he was face-guarding Rob Gronkowski, but the flag was picked up and the game was ended.  Tom Brady was clearly furious at the end of the game and understandably so.  What do you think, was it pass interference?  It will be interesting to see if the NFL has anything to say about this controversial finish.