A storming first-half display by Peterborough blew away Bristol Rovers.
Posh went ahead from Jamie Day's fierce shot into the roof of the net on eight minutes and it was 3-0 by the break.
Richard Butcher brushed aside the visiting defence before a cool finish and Simon Yeo bundled the ball in from close range after 35 minutes.
With the game all but up Rovers pulled one back from Sammy Igoe, but Lloyd Opara wormed his way through a crowded penalty area to make it four for Posh.
Peterborough: Tyler, Branston, Arber, Plummer, Newton, Holden, Butcher, Day (Stirling 70), Opara (Benjamin 80), Crow, Yeo (Richards 83).
Subs Not Used: Bailey, Huke.
Goals: Day 10, Butcher 32, Yeo 35, Opara 77.
Bristol Rovers: Phillips, Lescott, Hinton, Elliott, Carruthers (Ryan Green 75), Igoe, Hunt, Disley, Campbell (Sandell 45), Agogo (Haldane 45), Walker.
Subs Not Used: Shearer, Anthony.
Goals: Igoe 52.
Ref: D McDermid (Hampshire).