Everton chief executive Denise Barrett-Baxendale was 'put in a headlock' as she left the Goodison Park directors' box, club sources claim.
Another incident reportedly saw her car surrounded and spat at, while chairman Bill Kenwright is said to have received death threats. This is understood to be part of the backdrop to the safety advice warning the pair, and the rest of the club board, not to attend the club's crucial tie with Southampton on Saturday.
That advice was detailed in a statement released by the club just hours before the game, following which a peaceful protest against the running of the club was due to be held. Organisers had called for the demonstration to be respectful and immediately condemned any threats made towards club staff or directors.