A terrible error from goalkeeper Tim Krul gifted Pierre-Emerick Aubameyang his 50th Premier League goal as Arsenal thumped Norwich City at the Emirates, pushing the Canaries ever closer to relegation.
Krul foolishly attempted to fake a long kick and dribble past the Gabon striker in the 33rd minute, but he nicked the ball off the keeper's foot and rolled it into the net to reach a half-century of goals in the English top flight.
The Gunners scored a brilliant second four minutes later through Granit Xhaka, and though Norwich started the second half brightly, Aubameyang killed the game off with his second goal in the 67th minute.
Cedric Soares came off the bench to score his first goal for Arsenal in the 81st minute as the London club climbed to seventh place on 47 points.
Norwich remained bottom on 21 points, six behind 17th-placed West Ham United with six games left.
After an even start it was unsurprisingly the hosts who had the first decent chance, Aubameyang seeing his low effort pushed clear by Krul.
Norwich's first effort came from an unexpected source as centre-back Ben Godfrey, without a goal at this level, had Emiliano Martinez sprawling across his goal as a 30-yard strike fizzed wide.
Alexandre Lacazette then headed straight into the hands of Krul - but the Norwich stopper would soon be left red-faced.
Arsenal had opened the scoring at Southampton last weekend following a goalkeeping error and Krul mimicked Alex McCarthy here, dawdling in possession and striking his clearance straight at Aubameyang, who tucked home into an empty net.
Four minutes later and the game was taken away from Norwich, Kieran Tierney and Aubameyang combining before the latter fed Xhaka, who hit his first league goal in almost 14 months.
Norwich boss Daniel Farke reacted by making a trio of half-time changes and it was one of those, Ireland U21 international Adam Idah (above), who drew another smart stop out of Martinez soon after the restart.
Still chasing the game, the Norwich bench were left incensed as referee Peter Bankes and the video assistant referee decided that Sead Kolasinac had not fouled Todd Cantwell inside the box.
Farke's men had looked sharper for most of the second half, until their defensive frailties were once again laid bare for all to see.
A Norwich throw-in inside their own half was sent towards substitute Josip Drmic, who opted to send the ball back into the Canaries' penalty area and straight to Aubameyang - the Gabon striker more than happy to oblige in finishing for his second of the night.
The gloss was applied to this Arsenal display by debutant Soares, who needed just four minutes to mark his long-awaited bow with a goal as he struck from the edge of the box.
