Latest disappointment: Bruno Fernandes
Brajan Gruda and Danny Welbeck got the goals in either half to secure Fabian Hurzeler’s side a place in the fourth round, while Darren Fletcher’s winless start to his caretaker spell continues.
Benjamin Sesko notched a late deficit-halver, but it was too little, too late, as the home supporters booed their side off the field as United recorded their fourth game without a victory.
Young substitute Shea Lacey saw red in stoppage time as he was dismissed for a second bookable offence; throwing the ball in anger after not being awarded a throw-in.
More to follow.