While Norwich made it a hat-trick of wins, Neil Harris' outfit have now lost their last three.

The Lions' recent dip in form leaves them tottering precariously above the dreaded drop zone – just a point above the bottom three.

The hosts were unfortunate not to go ahead early on.

Jake Cooper's powerful header was blocked on the line before Steve Morison's follow-up was also cleared on the line.

Moments later, Lee Gregory's curling effort was well kept out by Dutch stopper Tim Krul in the Norwich net.

The title-chasing Canaries took the lead in the 16th minute.

Millwall keeper Jordan Archer did well to deny Onel Hernandez his eighth goal of the season but the rebound fell kindly for Stiepermann to open the scoring.

Just before the break, Pukki could only fire straight at Archer and the Lions levelled on the stroke of half-time when Shaun Williams headed home Morison's flick-on off the frame of the goal.

Norwich had the first glaring chance of the second period.

It fell to Max Aarons as his strike from the right-hand side trickled past a post.

Just before the hour, Morison headed the ball into Gregory's path, but the striker failed to connect cleanly.

With 21 minutes left, the table-toppers took the lead through Zimmermann.

The German rose highest to meet Emi Buendia's corner and sent his bullet header beyond a helpless Archer for his first Norwich goal since his debut.

And Buendia set up Pukki to wrap the game up 10 minutes later as the Finn fired home his 28th strike of the season.

The visitors survived a late scare as Krul produced a fine double save to keep out Morison and then Mahlon Romeo.

At the death, Archer denied Norwich a fourth with a good low stop from Pukki's strike and in stoppage time former Newcastle stopper Krul pulled off another decent save from Aiden O'Brien.

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