Man United supporters' protest against owners, the Glazer family, in pictures

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Old Trafford in lockdown following fan protest (0:41)

Mark Ogden reports from outside Old Trafford as fans invade the pitch ahead of Manchester United's match against Liverpool. (0:41)

A group of Manchester United fans gained entry to Old Trafford and ran onto the pitch and through concourses to protest against the club-owning Glazer family ahead of Sunday's Premier League match against Liverpool, causing kickoff to be delayed.

The protests began outside the United team hotel early Sunday morning, before some supporters moved on to Old Trafford. The demonstration comes following the club's failed attempt to join the proposed European Super League, which served to reinforce fan frustration against the club's American owners, who bought the club in 2005 and own the NFL's defending Super Bowl champion Tampa Bay Buccaneers.