Premier League leaders Liverpool scored twice inside the first 11 minutes at Carrow Road to take a commanding half-time lead against relegation-threatened Norwich City.
It took Brendan Rodgers's side less than four minutes to go in front. Raheem Sterling sidestepped past Robert Snodgrass and unleashed a stinging drive that flicked off Michael Turner before rippling the corner of the net.
John Ruddy then kept out Joe Allen's effort from a tight angle in the ninth minute, but soon it would be two for the Reds.
This time Sterling was the creator, weighting a low cross perfectly into the path of Luis Suarez, who opened his body to tuck home league goal number 30 for the season.
Norwich almost halved the deficit just after the quarter-hour mark when the ball dropped Gary Hooper's way in the area, but he couldn't squeeze off a shot.
Snodgrass was lucky not to see red for a late challenge on Allen before Norwich tested Simon Mignolet for the first time in the 32nd minute when Nathan Redmond drilled at the Belgian from distance.
Just before half time, Coutinho almost made it three when his curling shot from the left of the area flashed a yard wide of the far post.
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