Luton Town have moved to the top of League Two after a hard-fought victory over struggling Tranmere Rovers at Kenilworth Road.
Ricky Miller came off the bench to give the Hatters a 70th-minute lead and they were able to hold on to go two points clear of Wycombe Wanderers.
Stevenage move into the top half of the table after comfortably beating Cheltenham Town, with Chris Beardsley's first-half brace putting the Hertfordshire club on their way to a 5-1 win at the Lamex Stadium.
Hartlepool United's hopes of moving off the bottom of League Two were dashed when David Worrall scored in the 65th minute to give Southend United victory at Roots Hall. The Essex club remain in the playoff positions.
City are level on points with Dagenham & Redbridge, who narrowly lost away to AFC Wimbledon thanks to an early Barry Fuller strike at the Cherry Red Records Stadium, which saw the Dons register a first win in seven games.
Results in full: Plymouth Argyle 3-0 Portsmouth, Morecambe 1-0 Bury, AFC Wimbledon 1-0 Dagenham & Redbridge, Carlisle United 1-0 Accrington Stanley, Luton Town 1-0 Tranmere Rovers, Shrewsbury Town 2-0 Mansfield Town, Southend United 1-0 Hartlepool United, Stevenage 5-1 Cheltenham Town, York City 0-1 Oxford United