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 Gunners maintain their six-point lead over fifth-placed Tottenham while Norwich must regroup after a 12th defeat of the season.
Arteta later said, "It's a very satisfying result because in this festive period we have to keep performances to a high level.
"We looked really sharp and committed. It's a big win for us. I am really pleased. The amount of chance we create is pleasing.
"We go to every ground to try and impose our game. Today was a really good example. The unity we have around the club and with our fans is very pleasing."
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