Last updated on .From the section Scottish Championship

Thomas O'Ware (far right) set Morton on their way to victory at Tannadice

Dundee United remain 11 points behind Scottish Championship leaders St Mirren after a heavy defeat at home to Greenock Morton.

Morton, who move up to sixth, took the lead just before half-time with Thomas O'Ware heading in Michael Tidser's free-kick.

Scott Tiffoney fired into the top-left corner from 25 yards early in the second period.

Left-back Jack Iredale completed the win with a fine run and finish.

Jim Duffy's side leapfrog Inverness Caledonian Thistle and are now two points below Dunfermline Athletic and Queen of the South and five off third-placed Livingston.

United's advantage over Livi is cut to four points and the Tangerines have played a game more than the Lions but a game less than St Mirren.