Hundreds of United supporters took to the pitch just two hours before the scheduled 4.30pm kick-off at the club’s stadium, with thousands more gathering outside the ground in protest of the Glazer family’s ownership.
The protests come in the wake of United’s involvement in the collapsed Super League – a planned breakaway tournament, in which the Glazers played a key role.
No revised kick-off time has yet been given.
United fans also gathered outside the Lowry Hotel in Salford, preventing the club’s team bus from leaving for Old Trafford.
While the Old Trafford pitch and the area around United’s team bus have since been cleared, United players are currently waiting in their hotel rooms, according to Sky Sports.