A German football fan has been arrested after he was allegedly caught 'masturbating in the stands' while watching a Bundesliga clash.

The unknown Hertha Berlin supporter was snapped on video midway through the lewd act - and it was quickly uploaded to social media for all to see.

Originally posted by Twitter user dueSe04, the Schalke fan wrote: This really happened in the Arena yesterday. Unbelievable, ''before the video and pictures were later deleted.

The images of the man sprawled across the terraces with his jeans around his ankles unsurprisngly went viral, with many struggling to understand why someone would choose a football stadium to partake in such an act.