West Ham have vowed to assist in bringing those responsible for crowd trouble in their EFL Cup match against Chelsea to justice.
West Ham have condemned the crowd trouble that marred their 2-1 EFL Cup fourth-round victory over Chelsea on Wednesday.
The problems developed late in the game, as stewards battled to maintain segregation between the two sets of fans with Chelsea 2-0 down.
Previous incidents at matches against Watford and Middlesbrough - along with poor performances on the pitch - have made for a difficult start to life at London Stadium for West Ham, having left Upton Park at the end of last season.