Goals from Tony Craig and Neil Harris saw Millwall come from behind to beat leaders Norwich 2-1 at the New Den.
Canaries academy product Chris Martin opened the scoring after just four minutes with a low curling free-kick from 23 yards, firing in his 13th league goal of the season.
Parity was restored when full-back Craig's low shot from the left side of the penalty area found its way past the helpless Fraser Forster after 25 minutes, sending the home support into raptures.
Norwich right-back Russell Martin almost scored a wonder goal just minutes before the interval, producing a mesmerising run from his own half into the Lions penalty area before firing wide.
Kenny Jackett's half-time reshuffle worked a treat as substitute Harris headed home Chris Hackett's cross following a well-worked short corner to give the Lions the lead six minutes after the restart.
Millwall skipper Paul Robinson posed a threat from set-pieces all day, rising above the Norwich defence to head over Hackett's floated free kick after 64 minutes.
Hackett then went close himself moments later with a stinging drive from 30 yards that whistled over Forster's crossbar.
Forster showed why there is so much reported interest in his services with an instinctive one-handed stop to prevent Ipswich loanee Liam Trotter's deflected volley from extending the lead.
Defeat was Norwich`s first in 17 games but they stay top as a result of Leeds` 2-2 draw at Hartlepool.
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