West Ham co-chairman David Sullivan has apologised to Manchester United for the attack on their team coach by Hammers fans.
United’s bus was left with significant damage after being bombarded by missiles as it made its way to Upton Park ahead of Tuesday night’s game.
It caused a delay of 45 minutes to the kick-off and Sullivan initially blamed the events on United appearing late for the match.
But the Hammers chief has now admitted he was unaware of the severity of the incident and has said sorry to the Red Devils, while reiterating West Ham’s vow to hand down life bans to the culprits.
The vandalism overshadowed West Ham’s thrilling 3-2 win in their Upton Park farewell and Sullivan said: “If we were to have scripted how our final game at the Boleyn would have played out, it wouldn’t have been much different to last night’s match.
“The West Ham family then all celebrated our legends and former players together in what was a truly fitting ceremony to say goodbye to our home of 112 years.
“Sadly, the actions of very small minority of people outside the ground prior to kick-off risks overshadowing those celebrations. I want to be clear – their behaviour was completely unacceptable and does not represent our club or our values.
“When I was asked about the incident prior to yesterday’s [Tuesday] game, I was unaware of the damage that had occurred to the Manchester United team bus.
“I want to apologise to Manchester United for that damage and assure them that we will be doing all we can to track down those responsible and ban them for life.
“This morning I have already tasked my senior team to work with the police to identify them as their behaviour belongs in the past and not in a future that promises so much for our great club.
“I truly hope that in due course we will look back on what happened in the stadium rather than what happened outside and remember our farewell to the Boleyn for all the right reasons.”