Dumbarton’s relegation to Scottish League Two was confirmed despite battling to a goalless draw at home to Queen of South.
A second successive draw left the hosts 20 points adrift at the bottom of League One with only six games left to play.
Dumbarton were deducted 15 points in November after going into administration.
League leaders Arbroath dropped more points after they conceded a last-minute equaliser in a 1-1 draw at Kelty Hearts.
Arbroath – who drew at Dumbarton last weekend – had taken the lead in the 17th minute through Keith Watson.
But the home side snatched a point in the third minute of added time when Callum Flatman knocked the ball in following a goalmouth scramble.
Promotion-hopefuls Alloa drew 1-1 at struggling Inverness, who missed a penalty and finished with 10 men.
Alfie Stewart had given Caley Thistle an early lead, before Scott Taggart equalised in the 52nd minute.
On the hour, Alloa goalkeeper PJ Morrison saved a penalty from Billy Mckay, before Inverness defender Remi Savage was dismissed with four minutes left after collecting a second caution.
Blair Lyons scored twice in the opening 20 minutes as Montrose came from behind to beat relegation-battlers Annan 3-1.
In League Two, Peterhead moved top of the table with a 2-1 win at Sterling after East Fife were well beaten 5-2 at Edinburgh City.
Sterling had taken an early lead through Ryan Shanley, but Peterhead were soon level following an own goal from goalkeeper Derek Gaston in the fourth minute.
With four minutes left, Danny Strachan scored from close range to send the Blue Toon three points clear at the top.
East Fife slipped to a second successive league defeat as Jason Jarvis scored twice for Edinburgh at Meadowbank.
Jarvis opened the scoring from a fifth-minute penalty, with Innes Lawson adding another before half-time.
Midfielder Jarvis made it 3-0 in the 55th minute, with Tiwi Daramola swiftly scoring a fourth.
Alan Trouten got a goal back for the visitors just after the hour, but Malik Zaid netted a fifth for City ahead of a late consolation strike from East Fife substitute Adam Laaref.
First-half goals from Dajon Golding and Jack MacIver gave Elgin a 2-1 win at play-off rivals Spartans to keep themselves in the top four.
Alex Ferguson struck early in the second half as Forfar won 1-0 at Stranraer to haul themselves off the bottom above Bonnyrigg Rose, who were beaten 3-1 at Clyde.
