A first half hat-trick from Liam Buchanan sent Livingston on their way to a comfortable 5-1 win over Celtic U20 in the third round of the Scottish Challenge Cup.
The young Celtic side had been the only Premiership interest left at this stage of the competition but they could not go one further as League One Livingston sealed the win by half-time with all the goals coming in the opening 45 minutes.
Buchanan opened the scoring five minutes in before adding a second shortly after to put David Hopkin's side firmly in charge early on, with Sean Crighton making it 3-0 after 17 minutes.
Daniel Mullen extended the home side's lead after 35 minutes before Buchanan completed his hat-trick just moments later.
Celtic rallied and pulled one back before half-time through Regan Hendry but faced an uphill struggle in the second half with no more goals coming after the interval.
Dundee United needed an extra time winner from Tony Andreu to earn a 3-2 win over Peterhead at Tannadice.
The on loan Norwich midfielder struck the winner four minutes from the end of extra time to break Peterhead hearts and see United through to the fourth round of the cup.
United took the lead after just 51 seconds through Charlie Telfer but they could not build on their quick start and were pegged back by a Rory McAllister goal after 28 minutes.
The home side restored their advantage just five minutes later through Nick van der Velden but, again, that lead was short-lived when McAllister struck again just a minute later. It stayed that way until the 116th minute when Andreu popped up to bag a debut goal and seal the win.
Lawrence Shankland's extra-time header nudged St Mirren past Albion Rovers 4-3 in a cup thriller at Cliftonhill.
Any fans planning to leave at half-time will have got value for money as six goals flew in before the break. The Dunlop brothers fired Albion into an early two-goal lead, Ross turning home a saved free-kick on six minutes and Michael quickly heading in a second.
St Mirren replied through Lewis Morgan and Stephen Mallan and the Buddies' comeback seemed complete when John Sutton put Tom Walsh's cross away five minutes before the break, only for Ross Dunlop to scuff in a leveller.
After an uneventful second half, Shankland nodded the Saints into the fourth round draw in the 98th minute, with Albion's Mark Ferry then sent off.
There were shocks for Championship sides, however, as Forfar beat Raith Rovers 3-2, Queen's Park beat Morton 2-0 and Dumbarton went down 1-0 in Stranraer.
However, there were no such problems for Falkirk who thrashed Elgin 6-1 while Dunfermline beat Brechin City 5-1 away from home.
The biggest win of the day came at Palmerston as Queen of the South enjoyed a comfortable 7-1 victory over Stenhousemuir, while Alloa made it 10 wins on the spin with a 3-0 triumph over East Fife.
Championship leaders Hibernian travel to face Highland League side Turriff United on Sunday.