Saturday 1 October 2016 23:23, UK
West Ham will investigate disturbances outside the London Stadium after three arrests followed West Ham's draw with Middlesbrough on Saturday afternoon.
Two men were arrested on suspicion of affray and the third on suspicion of assaulting a police officer. All three currently remain in custody pending further enquiries.
During the match, officers were also deployed inside the stadium following a separate disturbance; the matter was quickly dealt with and no arrests were made.
The Hammers revealed they would probe the conduct from both sets of supporters.
A club spokesman said: "This behaviour has no place in football and West Ham United, with cooperation from all London Stadium stakeholders, including the police, Stadium Landlords E20 and Stadium Operators LS185, will continue to operate a zero tolerance policy on such incidents.
"We must stress that the vast majority of the more than 400,000 supporters who have attended a game at the Stadium since August have behaved impeccably, and we will not let the acts of mindless individuals tarnish their reputation."
Stewards confirmed that police had to separate home and away supporters after clashes on the loop road through the Olympic Park.
Police escorted Middlesbrough fans away from the stadium while cordoning off some West Ham supporters.
The trouble followed incidents of crowd disturbances inside the London Stadium during the recent matches against Bournemouth and Watford.
The Metropolitan Police added in a statement: "More than 40,000 people attended today's match, the vast majority of who were good natured, with only a small minority intent on causing disruption,"
There were no reported injuries following the disturbances and enquiries continue.
