Manchester United have beefed up security at the entrance to the club's Carrington training base after a group of angry fans broke in and confronted Ole Gunnar Solskjaer on Thursday.
The supporters were protesting against the club’s American owners over the club's leading role in the doomed European Super League and challenged manager Solskjaer about why he did not speak out against it.
The group of around 20 fans who breached the premises belong to the self-styled ‘Men in Black’ who also attacked United chief Ed Woodward’s house in Cheshire in January last year.
Solskjaer came out to try to placate them, accompanied by new technical director Darren Fletcher, coach Michael Carrick and 6ft 4in Serbia midfielder Nemanja Matic, on the condition that their conversation was not recorded.
But pictures of Solskjaer and other staff members arriving on Friday morning show a greater security presence at the entrance with even the manager getting a full check before he was allowed to enter.
It comes after Sportsmail exclusively revealed that United stars were shocked at how easily the fans were able to breach security.
Security guards were posted on the gate on Friday and everyone trying to enter the complex was asked for their ID.
Even manager Solskjaer was stopped and forced to remove his sunglasses to show the security team his face.