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Crowd trouble marred the boxing tonight after fan favourite Sam McNess was stopped in brutal fashion by Asinia Byfield.

McNess, who has a huge backing from West Ham supporters, took huge punishment in the fourth, with the heavy beating continuing in the next round before the towel was thrown in.

Byfield celebrated by jumping up on to the ropes and screaming at the crowd and throwing up the ‘Irons’ pose, which seemed to rile the fans.

The ring announcer at the Copper Box in Stratford, East London, could then be heard screaming for fans to behave, shouting: “Calm down.”

A prolonged advert break followed before BT Sport anchor Paul Dempsey provided an update, insisting it was a “quite serious incident” and that the authorities were dealing with the matter.

(Image: Getty Images Europe)

(Image: @rpjay2/Twitter) (Image: @RobSwan87/Twitter)

Video footage from inside the Copper Box shows large crowds squaring up to one another, with punches thrown.

Some of those involved looked to fall to the ground as the scenes escalated and stewards tried to regain control of the situation.

Byfield made a quick exit from the ring as the trouble continued.