"While the ball is in the air, Tate can be seen shoving Green Bay cornerback Sam Shields to the ground," the NFL said in a statement. "This should have been a penalty for offensive pass interference, which would have ended the game. It was not called and is not reviewable in instant replay."
However the NFL said the game officials were right not to overturn the on-field touchdown call after video review.
"Referee Wayne Elliott determined that no indisputable visual evidence existed to overturn the call on the field, and as a result, the on-field ruling of touchdown stood," the NFL said.
"The NFL Officiating Department reviewed the video today and supports the decision not to overturn the on-field ruling following the instant replay review. The result of the game is final."