The Iron made it three wins from their last four games as they secured a 3-2 success at Crewe.Oliver Turton gave the hosts the lead, but Luke Williams grabbed a brace and Hakeeb Adelakun also scored to keep United’s play-off hopes alive.
The hosts did pull a goal back through Marcus Haber, but it proved nothing more than a consolation for already relegated Crewe.
Elsewhere in League One, Wigan remain top of the table but they slipped to a 3-1 defeat at relegation threatened Doncaster.
Will Grigg gave the table toppers the lead, but an Andy Butler brace and an Andy Williams penalty gave Rovers’ survival hopes a needed boost.
Burton could not take full advantage of Wigan’s slip up, drawing 0-0 at home to play-off chasers Barnsley.
A late Walsall goal significantly boosted their automatic promotion hopes as they beat Southend 1-0 to go three points behind second.
Jordy Hiwula scored two minutes from time to secure what could be a vital win for the Saddlers, who have a game in hand.
Bradford continued their excellent run, but had to settle for a point at strugglers Shrewsbury, who find themselves just above the bottom four.
It looked like Jamie Proctor’s goal for the visitors would be the winner, only for Jean-Louis Akpa-Akpro to salvage a point for the Shrews.
Millwall played most of their defeat to Coventry with ten men as Shaun Williams saw red in their 2-1 loss.
Byron Webster had given them the lead, but John Fleck and Marcus Tudgay completed the turnaround after Williams’ dismissal.
Sixth placed Gillingham suffered their second successive defeat, with two quick fire goals giving Port Vale a 2-0 win.
Ajay Leitch-Smith and Carl Dickinson both scored to keep Vale’s slim chance of making the top six alive.
At the bottom, Colchester look likely to join Crewe in League Two as they fell to a 4-1 defeat against Peterborough, leaving them nine points from safety.
Jon Taylor, Andrew Fox, Shaquile Coulthirst and Marcus Maddison were all on target, with George Moncur getting the Colchester consolation.
Blackpool are also still in the bottom four, with the Tangerines slipping to a 3-0 defeat to play-off hopefuls Rochdale.
Ashley Eastham, Joe Bunney and Nathaniel Mendez-Liang all found the net as Rochdale moved to within four points of the top six.
Fleetwood and Oldham are both edging to safety and the two sides played out a 1-1 draw, with Stefan Scougall and Liam Kelly on target.
Meanwhile, Sheffield United eased past Chesterfield as Alex Baptiste, Che Adams and Billy Sharp all scored in a 3-0 win.
Bury edged a tight game at Swindon, with Danny Mayor’s second half header proving to be the only goal.
The Shakers are the Iron’s next opponents on Tuesday night, and Graham Alexander’s side will be looking to continue their strong end to the season.
Tweets by @SUFCOfficial