Manchester United's mice infestation made a public showing during their win over Southampton on Thursday as footage shared on social media appears to show a mouse running on the pitch.
The English giants have been battling a mice infestation since December when Mail Sport revealed the club had been slapped with a two-star hygiene rating after droppings were discovered on a visit by hygiene inspectors.
Club officials have been actively working with pest control partners and the local council to implement a series of measures aimed at tackling the problem.
Mail Sport understands that inspectors found evidence of mice activity in a ground level corporate suites and in a kiosk that sells food to fans on a concourse.