About an hour before kick-off Boca officials told reporters that some of their players were not fit to play the second leg against River Plate, with the scores locked at 2-2 from the first encounter.
Conmebol eventually decided to call off the game until Sunday - 5pm local time, 8pm in the UK.
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And now, footage has emerged on social media of the attack on the bus.
It also shows close-ups of the bus after the attack, with windows smashed from the projectiles that were thrown.
And a video from journalist Martin Mazur seems to show the footage of the players on the bus at the attack happened.
The inside of the Boca bus was also tweeted, showing some of the windows completely destroyed.
Later in the evening footage of the injured players was put on social accounts, with Boca player Pablo Perez speaking to reporters with his eye patched up.
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Quintero stunner in extra-time helps River down Boca in dramatic final