West Ham have demanded that London Stadium owners E20 guarantee a police presence at future matches following crowd trouble during Saturday's 4-2 Premier League defeat to Watford.
An unspecified number of fans were ejected from the London Stadium after fights broke out in the closing stages of the game, although the Met Police have stated there were no arrests.
"West Ham United undertook a full investigation into the crowd issues immediately after Saturday's game with Watford and today held a productive meeting with stadium owners E20," said a statement on the official club website.
"Today, the club have insisted that E20 guarantee a police presence in the stadium.