The footage, shot by Jesse Lingard, shows the players taking cover from the missiles, including glass bottles, being thrown at the windows.
— BenchWarmers (@BeWarmers) May 10, 2016
However Chris Smalling seems to have been less perturbed by the attack.
Kick-off for the final game to be staged at Upton Park was delayed until 8:30pm after United's players did not reach the ground until 7:10pm.
United captain Wayne Rooney spoke of the situation before kick-off.
"It wasn't nice," he said.
"The coach got smashed up, but we're here now, so have to prepare for the game and go out and do our job.
"I'm sure you'll see the images. That's not for me to say, but I think it was disappointing of course.
"We know it's a big game for West Ham, big night for them, leaving the stadium, but I'm sure West Ham as a club will be disappointed with what the fans have done."