Interesting report from BBC reporter.
"I am about 100 yards from the main entrance to the ground, what makes this evening unusual is the sheer number of supporters outside the ground.. The key thing is many want to be here to be part of the atmosphere.
"Right outside the ground was the Manchester United coach and it was stuck, it wasn't going anywhere. There were about 10 police vans in front of it and it was surrounded by a sea of fans. I didn't see any bottles being thrown then, I watched for a couple of minutes, but I have seen videos on social media of a couple of bottles being thrown.
"Most fans standing around were gesturing and singing, to say the bus was being attacked I think is something of an exaggeration."