West Ham will move supporters from their ticketed seats to widen the segregation at London Stadium in a bid to prevent further trouble against Stoke City on Saturday.
The Hammers are cancelling away fans' tickets and relocating them to move rival supporters further apart in the wake of the crowd disturbances that marred last week's EFL Cup win over Chelsea.
Stoke are trying to contact a group of around 85 of their travelling support to inform them of the changes before Saturday's game while West Ham season-ticket holders have also reported that they have been asked to move.