There were unpleasant scenes at the City Ground as Manchester United fans tumbled onto collapsed advertising hoarding while celebrating their side's third goal.
It came about after the United players went to celebrate after Fernandes thumped home from Anthony Elanga's smart flick in the 89th minute as United ran out 3-0 winners in the first leg.
But as cameras panned to the celebrations in the stands, United fans came rushing down while the advertising hoarding was collapsing.
It looked for a moment like it was going to turn ugly, but the board was quickly reassembled and the fans did well not to spill onto the pitch.
From what could be seen, it looks as though fans escaped injuries, as stewards rushed over to help.
Fernandes' last-minute strike sealed a convincing win for United who take a three-goal advantage back to Old Trafford.
More to follow.