Dundee United stretch their lead at the top of the second tier to four points after a convincing win - their first in four meetings - over their closest challengers, Raith Rovers, although the Kirkcaldy side still have a game in hand.
Dunfermline survive a two-goal fightback by bottom side Arbroath to move up to fourth above Airdrieonians, who also drop behind Morton after the Greenock side beat Queen's Park.
Partick Thistle consolidate third and leave Caley Thistle four adrift of Queen's Park in the relegation play-off spot.
Arbroath 2-3 Dunfermline Athletic
Dundee United 2-0 Raith Rovers
Greenock Morton 2-0 Queen's Park
Partick Thistle 1-0 Inverness Caledonian Thistle
Falkirk clinch League 1 title
Falkirk don't kick off for another 25 minutes in Montrose, but they have already been crowned League 1 champions.
That's thanks to nearest challengers Hamilton being held to a goalless draw by Queen of the South.
You can watch the Bairns' celebrations live on BBC Alba shortly - click the wee button at the top of the page.
FULL-TIME St Johnstone 1-2 Dundee
Dundee are back into the top six with victory in their derby in Perth, leapfrogging Hibs.
Disappointing for St Johnstone, who remain just one point clear of the Ross County in 11th.
FULL-TIME Rangers 3-1 Hibernian
Rangers return to the summit of the Premiership courtesy of goals from James Tavernier, Cyriel Dessers and Rabbi Matondo.
Myziane Maolida pulled Hibs level, but the Easter Road side were picked off and drop out of the top six.
SNSCopyright: SNS
Cyriel Dessers scored Rangers' second goalImage caption: Cyriel Dessers scored Rangers' second goal
FULL-TIME Motherwell 1-1 St Mirren
St Mirren will have to wait to confirm their place in the top sixafter Motherwell come from behind to draw.
The head of Marcus Fraser gave the visitors the lead in the first half as he nodded in a corner following Andy Halliday's missed clearing header.
Motherwell's talisman Theo Bair bundled in a leveller in the 74th minute to keep Stuart Kettlewell's slim top six dream alive.
SNSCopyright: SNS
Theo Bair equalised for MotherwellImage caption: Theo Bair equalised for Motherwell
FULL-TIME Aberdeen 2-1 Ross County
A massive victory for Aberdeen - a blow for County.
The hosts overcome a strong Staggies performance, with Jamie McGrath's 79th-minute strike proving to be the winner.
SNSCopyright: SNS
FULL-TIME Heart of Midlothian 1-1 Kilmarnock
Marley Watkins' stunning equaliser means Hearts and Killie share the points at Tynecastle and remain in third and fourth place respectively.
Kenneth Vargas had nodded the hosts ahead in the 10th minute, but Derek McInnes' side huffed and puffed and eventually found an equaliser with Watkins' curling effort from the edge of the box.
SNSCopyright: SNS
Post update
St Johnstone 1-2 Dundee
VAR are having a look at a possible St Johnstone equaliser.
Ryan McGowan heads the ball out of Jon McCracken's hands and into the back of the net. He also shoves Aaron Donnelly in the process.
The goal wasn't given initially.
No goal!
GOAL Rangers 3-1 Hibernian
Rabbi Matondo
Rangers settle the game!
And in some style. A gorgeous curling effort from substitute Rabbi Matondo nestles into the bottom corner.
Looks like Rangers are back on top.
BBC SportCopyright: BBC Sport
Sima returns from injury
Rangers 2-1 Hibernian
Ibrox rises to its feet as Abdallah Sima makes his return from injury.
The on-loan Brighton & Hove Albion striker is joined by winger Rabbi Matondo, as Cyriel Dessers and Fabio Silva head off.
Post update
Heart of Midlothian 1-1 Kilmarnock
Goalkeeper Zander Clark tips an edge-of-the-area Marley Watkins strike over the bar as the visitors search for a winner.
From the resulting corner, Joe Wright almost scores with a powerful header.
HITS THE WOODWORK
Aberdeen 2-1 Ross County
Aberdeen midfielder Dante Polvara cracks the woodwork with a thunderous strike on the volley.
Post update
Aberdeen 2-1 Ross County
Big chance for the visitors to immediately equalise.
Victor Loturi latches on to a neat Jordan White through ball, but the Canadian midfielder lashes his strike wide of the mark.
GOAL St Johnstone 1-2 Dundee
Amadou Bakayoko
Dundee are back in front!
Luke McCowan's cross falls right into the path of Amadou Bakayoko and the forward coolly slides it into the back of the net.
BBC SportCopyright: BBC Sport
GOAL Dundee United 2-0 Raith Rovers
Louis Moult (penalty)
The Championship leaders look to be on the way to a massive win against their nearest challengers as they extend their lead.
BBC SportCopyright: BBC Sport
GOAL Aberdeen 2-1 Ross County
Jamie McGrath
A potentially huge goal at the bottom-end of the Premiership!
Irish midfielder Jamie McGrath turns in a low Duk cross to put the hosts in front with 10 minutes remaining.
BBC SportCopyright: BBC Sport
GOAL Motherwell 1-1 St Mirren
Theo Bair
Jack Vale hangs a cross up to the back post, Stephen O'Donnell heads across and there he is - Theo Bair on the prowl to bundle it home.
St Mirren just had a good 20-minute spell, but they couldn't take full advantage. Anyone's game now!
BBC SportCopyright: BBC Sport
CLOSE!
Aberdeen 1-1 Ross County
Leighton Clarkson's free-kick is only just wide of George Wickens' goal.
Strong effort from the Aberdeen midfielder.
Post update
Rangers 2-1 Hibernian
Rangers just keeping things ticking over at Ibrox.
Not much to report in terms of chances, which might suit home manager Philippe Clement.
Their lead is still a slender one, however.
YELLOW CARD
Aberdeen 1-1 Ross County
County goalkeeper George Wickens wipes out Duk well, well outside his area after rushing out to clear a long Kelle Roos punt forward.
Aberdeen players surround Kevin Clancy, but there is no changing the referee's mind.
Live Reporting
Clive Lindsay
All times stated are UK
FULL-TIME SCORES
Scottish Championship
Dundee United stretch their lead at the top of the second tier to four points after a convincing win - their first in four meetings - over their closest challengers, Raith Rovers, although the Kirkcaldy side still have a game in hand.
Dunfermline survive a two-goal fightback by bottom side Arbroath to move up to fourth above Airdrieonians, who also drop behind Morton after the Greenock side beat Queen's Park.
Partick Thistle consolidate third and leave Caley Thistle four adrift of Queen's Park in the relegation play-off spot.
Falkirk clinch League 1 title
Falkirk don't kick off for another 25 minutes in Montrose, but they have already been crowned League 1 champions.
That's thanks to nearest challengers Hamilton being held to a goalless draw by Queen of the South.
You can watch the Bairns' celebrations live on BBC Alba shortly - click the wee button at the top of the page.
FULL-TIME St Johnstone 1-2 Dundee
Dundee are back into the top six with victory in their derby in Perth, leapfrogging Hibs.
Disappointing for St Johnstone, who remain just one point clear of the Ross County in 11th.
FULL-TIME Rangers 3-1 Hibernian
Rangers return to the summit of the Premiership courtesy of goals from James Tavernier, Cyriel Dessers and Rabbi Matondo.
Myziane Maolida pulled Hibs level, but the Easter Road side were picked off and drop out of the top six.
FULL-TIME Motherwell 1-1 St Mirren
St Mirren will have to wait to confirm their place in the top sixafter Motherwell come from behind to draw.
The head of Marcus Fraser gave the visitors the lead in the first half as he nodded in a corner following Andy Halliday's missed clearing header.
Motherwell's talisman Theo Bair bundled in a leveller in the 74th minute to keep Stuart Kettlewell's slim top six dream alive.
FULL-TIME Aberdeen 2-1 Ross County
A massive victory for Aberdeen - a blow for County.
The hosts overcome a strong Staggies performance, with Jamie McGrath's 79th-minute strike proving to be the winner.
FULL-TIME Heart of Midlothian 1-1 Kilmarnock
Marley Watkins' stunning equaliser means Hearts and Killie share the points at Tynecastle and remain in third and fourth place respectively.
Kenneth Vargas had nodded the hosts ahead in the 10th minute, but Derek McInnes' side huffed and puffed and eventually found an equaliser with Watkins' curling effort from the edge of the box.
Post update
St Johnstone 1-2 Dundee
VAR are having a look at a possible St Johnstone equaliser.
Ryan McGowan heads the ball out of Jon McCracken's hands and into the back of the net. He also shoves Aaron Donnelly in the process.
The goal wasn't given initially.
No goal!
GOAL Rangers 3-1 Hibernian
Rabbi Matondo
Rangers settle the game!
And in some style. A gorgeous curling effort from substitute Rabbi Matondo nestles into the bottom corner.
Looks like Rangers are back on top.
Sima returns from injury
Rangers 2-1 Hibernian
Ibrox rises to its feet as Abdallah Sima makes his return from injury.
The on-loan Brighton & Hove Albion striker is joined by winger Rabbi Matondo, as Cyriel Dessers and Fabio Silva head off.
Post update
Heart of Midlothian 1-1 Kilmarnock
Goalkeeper Zander Clark tips an edge-of-the-area Marley Watkins strike over the bar as the visitors search for a winner.
From the resulting corner, Joe Wright almost scores with a powerful header.
HITS THE WOODWORK
Aberdeen 2-1 Ross County
Aberdeen midfielder Dante Polvara cracks the woodwork with a thunderous strike on the volley.
Post update
Aberdeen 2-1 Ross County
Big chance for the visitors to immediately equalise.
Victor Loturi latches on to a neat Jordan White through ball, but the Canadian midfielder lashes his strike wide of the mark.
GOAL St Johnstone 1-2 Dundee
Amadou Bakayoko
Dundee are back in front!
Luke McCowan's cross falls right into the path of Amadou Bakayoko and the forward coolly slides it into the back of the net.
GOAL Dundee United 2-0 Raith Rovers
Louis Moult (penalty)
The Championship leaders look to be on the way to a massive win against their nearest challengers as they extend their lead.
GOAL Aberdeen 2-1 Ross County
Jamie McGrath
A potentially huge goal at the bottom-end of the Premiership!
Irish midfielder Jamie McGrath turns in a low Duk cross to put the hosts in front with 10 minutes remaining.
GOAL Motherwell 1-1 St Mirren
Theo Bair
Jack Vale hangs a cross up to the back post, Stephen O'Donnell heads across and there he is - Theo Bair on the prowl to bundle it home.
St Mirren just had a good 20-minute spell, but they couldn't take full advantage. Anyone's game now!
CLOSE!
Aberdeen 1-1 Ross County
Leighton Clarkson's free-kick is only just wide of George Wickens' goal.
Strong effort from the Aberdeen midfielder.
Post update
Rangers 2-1 Hibernian
Rangers just keeping things ticking over at Ibrox.
Not much to report in terms of chances, which might suit home manager Philippe Clement.
Their lead is still a slender one, however.
YELLOW CARD
Aberdeen 1-1 Ross County
County goalkeeper George Wickens wipes out Duk well, well outside his area after rushing out to clear a long Kelle Roos punt forward.
Aberdeen players surround Kevin Clancy, but there is no changing the referee's mind.