Partick Thistle remain within two points of First Division leaders Morton after thumping Livingston at Firhill.
The hosts, who have two games in hand on their Greenock rivals, took the lead after 19 minutes when Aaron Muirhead scored from the penalty spot after Paul Watson handled inside the area.
Steven Craig doubled the advantage three minutes later when he rose highest to head home Sean Welsh's cross.
Victory was all but ensured just after the half-hour mark when James Craigen produced a fine strike from 18 yards
Steven Lawless added further gloss with a close-range effort two minutes before the break but Watson did go some way to making amends with a consolation goal early in the second half.
The Jags soon recovered as Chris Erskine embarked on a mazy run before coolly converting a return pass from Kris Doolan's on 56 minutes.
Doolan then got his name on the scoresheet when he was well-placed to finish after some good work by Aaron Sinclair.
Partick Thistle: Fox, Stephen O'Donnell, Muirhead, Balatoni, Sinclair, Paton, Craigen, Lawless, Welsh (Forbes 78), Erskine (Elliot 73), Craig (Doolan 46). Subs Not Used: Daniels, Archibald.
Goals: Muirhead 19 pen, Craig 22, Craigen 36, Lawless 43, Erskine 57, Doolan 69.
Livingston: McNeil, McCann, Watson (Talbot 73), Barr, Booth, Kyle Jacobs, Fox, O'Brien, Andreu (Morton 60), McNulty, Iain Russell (Mullen 46). Subs Not Used: Jamieson, Ross Gray.
Booked: Fox, O'Brien.
Goals: Watson 46.
Ref: George Salmond