A group of so-called urban explorers called Night Scape posted footage online of them sneaking into West Ham's London Stadium at night and clambering all over the stadium's roof before somersaulting on the pitch.
The group are seen in the footage below dangling their legs from the roof of the Hammers' new home and exploring around the new stadium which is lit and seemingly absent of a security presence.
Per Sky Sports, the operators of the stadium say they are looking into firming up out of hours security whilst the Metropolitan police have begun investigating to see if any formal offences were committed.
The ease with which the youngsters were able to gain access to the stadium and roam around must certainly be a concern for all authorities involved.
The video, which can be seen below, is yet another security concern for West Ham following numerous incidents of fan violence since their move to the Stratford venue at the beginning of this season.
Here's the daring security breach in full...
Almost every home game this season has seen arrests and banning orders handed out for both home and away fans and their match against Watford even saw fighting between home fans.
Three further men were arrested this weekend after the Hammers' 1-1 draw with Middlesborough in connection with disturbances after the game.
However, co-owner David Sullivan has leapt to the defence of his fans claiming that the stories have been sensationalised by the media and describing the incidents as 'routine'.
Sullivan said, via Sky Sports:
"It makes me angry to read stories sensationalising the events outside London Stadium.
"A group of mindless thugs with no intention of watching the game came together outside the ground, and three arrests were made...
"I have watched all the videos and as far as I can see, any issues were routine football problems that were dealt with swiftly and safely."
He continued to add:
"The overwhelming majority of West Ham United and Middlesbrough supporters behaved absolutely impeccably, which is something that seems to get forgotten time and time again."
Whatever the opinion of the owner it is clear that there are multiple issues with security both during and after games at the new stadium.