BBC News –West Ham will issuelife bans to any fans found responsible for attacking the Manchester Unitedteam coach before Tuesday's game at Upton Park

BBC News –West Ham will issuelife bans to any fans found responsible for attacking the Manchester Unitedteam coach before Tuesday's game at Upton Park

A window on the bus was smashed and thekick-off delayed by 45 minutes as a result of the trouble

We are aware that there were somesupporters outside the Boleyn Ground who didn't act in an appropriate way, aclub statement read

It added: "We will work closely withboth clubs and the Metropolitan Police to fully investigate thesematters."

Bottles were also thrown at ManchesterUnited goalkeeper David de Gea during the match, while another fan invaded thepitch to confront the Spaniard

West Ham eventually won 3-2 in what wastheir final game at the ground before moving to the Olympic Stadium

Footage filmed on the coach by ManchesterUnited winger Jesse Lingard showed the players shouting, screaming, laughingand hiding on the floor as the coach was hit by objects thrown outside theground

In an update on Wednesday morning, theMetropolitan Police said four police officers had been injured during thetrouble

It added that no arrests have been madeover criminal damage to the coach, but said three men were arrested during thegame, including a 20-year-old on suspicion of affray and a 47-year-old and18-year-old for pitch incursion