West Ham should be forced to play behind closed doors if the violence that marred Wednesday's derby with Chelsea is repeated, an MP has said.
Bottles, seats and coins were thrown at London Stadium as hundreds of fans clashed. Seven people were arrested.
It was the latest outbreak of disorder at West Ham's new ground this season.
"None of these problems were unforeseeable given the nature of the stadium and difficulties with policing large crowds," said Mark Field MP.
"Within the next 14 days, the West Ham board should present a detailed plan to the Football Association and Premier League outlining what they are going to do about security," the all-party parliamentary football group vice-chairman told the Evening Standard.