Sebastian Larsson's stunning goal set up a comfortable 3-0 victory for Sunderland as they dragged themselves further clear of the Barclays Premier League relegation zone.
The Sweden international set the Black Cats on their way with a 12th-minute piledriver, and the game was effectively over when Adam Johnson scored from close range after taking advantage of comical defending by West Ham two minutes after the restart.
James McClean wrapped up the win 16 minutes from time after Stephane Sessegnon had left defenders trailing in his wake, and not for the first time.
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