Arsenal secured their fourth Premier League victory in a row as they ran out comfortable winners at Carrow Road and heaped more misery on bottom-of-the-table Norwich.
Bukayo Saka opened the scoring after six minutes when he guided a low shot past Angus Gunn at the end of a slick Arsenal attack.
The impressive Martin Odegaard, who teed up Saka’s opener, then sent Kieran Tierney through to score the away side’s second just before half-time.
Saka added a fine third before Alexandre Lacazette’s penalty and substitute Emile Smith Rowe’s stoppage-time strike wrapped up a stress-free win for Mikel Arteta’s side.
The win meant the Gunners maintained their six-point lead over fifth-placed Tottenham while Norwich must regroup after a 12th defeat of the season, with boss Dean Smith admitting that he “didn’t see that coming” after watching his side go “toe-to-toe” in defeats by Manchester United and Aston Villa.
“This was just as flat a performance as we have had and it was littered with unforced errors,” said Smith.