Violence broke out between West Ham and Millwall supporters, prior to kick off in tonight's second round Carling Cup.

British police officers in riot gear surround soccer supporters outside Upton Park stadium, London, Tuesday, Aug. 25, 2009. A fan was stabbed during large scale violence before an English League Cup game between West Ham and Millwall on Tuesday while the match was interrupted by a pitch invasion.

LONDON, ENGLAND - AUGUST 25: A man receives treatment after clashes with rival supporters on August 25, 2009 in London, England. Violence broke out between West Ham and Millwall supporters, prior to kick off in tonight's second round Carling Cup at Upton Park. According to reports bricks and bottles were being used as missiles as fans broke through a riot police divide.

LONDON, ENGLAND - AUGUST 25: A man receives treatment after clashes with rival supporters on August 25, 2009 in London, England. Violence broke out between West Ham and Millwall supporters, prior to kick off in tonight's second round Carling Cup at Upton Park. According to reports bricks and bottles were being used as missiles as fans broke through a riot police divide.

LONDON, ENGLAND - AUGUST 25: Carlton Cole of West Ham United controls the ball as Jack Smith of Millwall looks on during the Carling Cup second round match between West Ham United and Millwall at Upton Park on August 25, 2009 in London, England.

LONDON, ENGLAND - AUGUST 25: James Tomkins of West Ham United is grabbed by a fan during the Carling Cup second round match between West Ham United and Millwall at Upton Park on August 25, 2009 in London, England. Violence broke out between West Ham and Millwall supporters, prior to kick off in tonight's second round Carling Cup tie at Upton Park. According to reports bricks and bottles were being used as missiles as fans broke through a riot police divide.

LONDON, ENGLAND - AUGUST 25: A West Ham United fan confronts the stewards during the Carling Cup second round match between West Ham United and Millwall which was marred by violence at Upton Park on August 25, 2009 in London, England.

LONDON, ENGLAND - AUGUST 25: Stewards stand infront of the Millwall fans during the Carling Cup second round match between West Ham United and Millwall at Upton Park on August 25, 2009 in London, England. . Violence broke out between West Ham and Millwall supporters, prior to kick off in tonight's second round Carling Cup at Upton Park. According to reports bricks and bottles were being used as missiles as fans broke through a riot police divide.

LONDON, ENGLAND - AUGUST 25: Fans invade the pitch during the Carling Cup second round match between West Ham United and Millwall at Upton Park on August 25, 2009 in London, England. .Violence broke out between West Ham and Millwall supporters, prior to kick off in tonight's second round Carling Cup at Upton Park. According to reports bricks and bottles were being used as missiles as fans broke through a riot police divide

LONDON, ENGLAND - AUGUST 25: Fans invade the pitch during the Carling Cup second round match between West Ham United and Millwall at Upton Park on August 25, 2009 in London, England. Violence broke out between West Ham and Millwall supporters, prior to kick off in tonight's second round Carling Cup at Upton Park. According to reports bricks and bottles were being used as missiles as fans broke through a riot police divide.

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